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| Round 1 |
|---|
| Fri | Mar 13 | 1998 | | Auckland Warriors | 18 | - | 24 | South Sydney Rabbitohs | Ericsson | 10,754 | E. Ward | > |
| Fri | 13 | 1998 | | Adelaide Rams | 8 | - | 18 | North Queensland Cowboys | Adelaide | 11,289 | M. Hewitt | > |
| Fri | 13 | 1998 | | Brisbane Broncos | 22 | - | 6 | Manly Warringah Sea Eagles | ANZ | 39,109 | B. Harrigan | > |
| Sat | 14 | 1998 | | Parramatta Eels | 27 | - | 16 | Penrith Panthers | Parramatta | 12,222 | S. Clark | > |
| Sat | 14 | 1998 | | Balmain Tigers | 40 | - | 6 | Gold Coast Chargers | Leichhardt | 7,120 | S. Chiddy | > |
| Sat | 14 | 1998 | | Cronulla Sutherland Sharks | 14 | - | 36 | Sydney City Roosters | Shark Park | 17,828 | P. Simpkins | > |
| Sat | 14 | 1998 | | Illawarra Steelers | 12 | - | 14 | Melbourne Storm | WIN | 10,695 | S. Hampstead | > |
| Sun | 15 | 1998 | | Canterbury Bankstown Bulldogs | 20 | - | 10 | Canberra Raiders | Belmore | 8,453 | B. Grant | > |
| Sun | 15 | 1998 | | North Sydney Bears | 14 | - | 18 | Newcastle Knights | North Sydney | 11,268 | P. McBlane | > |
| Sun | 15 | 1998 | | St George Dragons | 36 | - | 18 | Western Suburbs Magpies | Kogarah | 7,206 | T. Mander | > |
| Round 2 |
|---|
| Fri | Mar 20 | 1998 | | Sydney City Roosters | 8 | - | 26 | North Sydney Bears | SFS | 15,221 | S. Clark | > |
| Sat | 21 | 1998 | | Penrith Panthers | 28 | - | 24 | Canberra Raiders | Penrith | 7,120 | B. Harrigan | > |
| Sat | 21 | 1998 | | Newcastle Knights | 33 | - | 4 | Auckland Warriors | Marathon | 23,503 | P. Simpkins | > |
| Sat | 21 | 1998 | | Gold Coast Chargers | 12 | - | 14 | Parramatta Eels | Carrara | 9,734 | M. Hewitt | > |
| Sat | 21 | 1998 | | North Queensland Cowboys | 26 | - | 2 | Balmain Tigers | Malanda | 18,399 | E. Ward | > |
| Sun | 22 | 1998 | | Canterbury Bankstown Bulldogs | 12 | - | 20 | Brisbane Broncos | Belmore | 10,963 | T. Mander | > |
| Sun | 22 | 1998 | | Manly Warringah Sea Eagles | 22 | - | 6 | Adelaide Rams | Brookvale | 6,434 | S. Hampstead | > |
| Sun | 22 | 1998 | | St George Dragons | 14 | - | 20 | Cronulla Sutherland Sharks | Kogarah | 15,189 | B. Grant | > |
| Sun | 22 | 1998 | | South Sydney Rabbitohs | 14 | - | 22 | Illawarra Steelers | SFS | 8,708 | P. McBlane | > |
| Sun | 22 | 1998 | | Western Suburbs Magpies | 16 | - | 26 | Melbourne Storm | Campbelltown | 6,939 | S. Chiddy | > |
| Round 3 |
|---|
| Fri | Mar 27 | 1998 | | Auckland Warriors | 25 | - | 14 | Sydney City Roosters | Ericsson | 9,431 | T. Mander | > |
| Fri | 27 | 1998 | | Balmain Tigers | 18 | - | 4 | Manly Warringah Sea Eagles | Leichhardt | 15,079 | P. McBlane | > |
| Fri | 27 | 1998 | | Adelaide Rams | 22 | - | 20 | Canterbury Bankstown Bulldogs | Adelaide | 8,390 | B. Harrigan | > |
| Sat | 28 | 1998 | | Illawarra Steelers | 18 | - | 37 | Newcastle Knights | WIN | 9,141 | S. Clark | > |
| Sat | 28 | 1998 | | Cronulla Sutherland Sharks | 18 | - | 26 | Melbourne Storm | Shark Park | 11,346 | E. Ward | > |
| Sat | 28 | 1998 | | Brisbane Broncos | 26 | - | 18 | Penrith Panthers | ANZ | 18,570 | B. Grant | > |
| Sun | 29 | 1998 | | Canberra Raiders | 18 | - | 4 | Gold Coast Chargers | Fisher | 6,432 | S. Hampstead | > |
| Sun | 29 | 1998 | | North Sydney Bears | 28 | - | 8 | St George Dragons | North Sydney | 11,418 | P. Simpkins | > |
| Sun | 29 | 1998 | | Parramatta Eels | 15 | - | 16 | North Queensland Cowboys | Parramatta | 10,177 | S. Chiddy | > |
| Sun | 29 | 1998 | | Western Suburbs Magpies | 42 | - | 6 | South Sydney Rabbitohs | Campbelltown | 9,304 | M. Hewitt | > |
| Round 4 |
|---|
| Fri | Apr 3 | 1998 | | Manly Warringah Sea Eagles | 10 | - | 34 | Parramatta Eels | Brookvale | 14,366 | B. Harrigan | > |
| Fri | 3 | 1998 | | Melbourne Storm | 24 | - | 16 | North Sydney Bears | Olympic Park | 20,522 | T. Mander | > |
| Fri | 3 | 1998 | | Sydney City Roosters | 30 | - | 16 | Illawarra Steelers | SFS | 7,016 | P. McBlane | > |
| Sat | 4 | 1998 | | South Sydney Rabbitohs | 2 | - | 6 | Cronulla Sutherland Sharks | SFS | 6,144 | P. Simpkins | > |
| Sat | 4 | 1998 | | North Queensland Cowboys | 14 | - | 12 | Canberra Raiders | Malanda | 20,048 | S. Clark | > |
| Sat | 4 | 1998 | | St George Dragons | 28 | - | 24 | Auckland Warriors | Kogarah | 10,003 | S. Hampstead | > |
| Sun | 5 | 1998 | | Canterbury Bankstown Bulldogs | 10 | - | 24 | Balmain Tigers | Belmore | 10,152 | E. Ward | > |
| Sun | 5 | 1998 | | Gold Coast Chargers | 18 | - | 40 | Brisbane Broncos | Carrara | 13,126 | M. Hewitt | > |
| Sun | 5 | 1998 | | Newcastle Knights | 34 | - | 18 | Western Suburbs Magpies | Marathon | 17,408 | B. Grant | > |
| Sun | 5 | 1998 | | Penrith Panthers | 54 | - | 12 | Adelaide Rams | Penrith | 6,637 | M. Jadwat | > |
| Round 5 |
|---|
| Thu | Apr 9 | 1998 | | Western Suburbs Magpies | 4 | - | 22 | Sydney City Roosters | Campbelltown | 8,543 | M. Hewitt | > |
| Thu | 9 | 1998 | | Adelaide Rams | 8 | - | 16 | Gold Coast Chargers | Adelaide | 7,058 | T. Mander | > |
| Fri | 10 | 1998 | | Auckland Warriors | 16 | - | 12 | Melbourne Storm | Ericsson | 14,213 | B. Harrigan | > |
| Fri | 10 | 1998 | | Newcastle Knights | 24 | - | 10 | Cronulla Sutherland Sharks | Marathon | 20,073 | S. Clark | > |
| Sat | 11 | 1998 | | Balmain Tigers | 30 | - | 10 | Penrith Panthers | Leichhardt | 8,277 | S. Hampstead | > |
| Sat | 11 | 1998 | | Illawarra Steelers | 12 | - | 19 | St George Dragons | WIN | 9,427 | B. Grant | > |
| Sat | 11 | 1998 | | Parramatta Eels | 22 | - | 14 | Canterbury Bankstown Bulldogs | Parramatta | 14,012 | P. Simpkins | > |
| Sun | 12 | 1998 | | Brisbane Broncos | 58 | - | 4 | North Queensland Cowboys | ANZ | 20,904 | E. Ward | > |
| Sun | 12 | 1998 | | Canberra Raiders | 26 | - | 20 | Manly Warringah Sea Eagles | Bruce | 13,202 | P. McBlane | > |
| Sun | 12 | 1998 | | North Sydney Bears | 42 | - | 8 | South Sydney Rabbitohs | North Sydney | 15,077 | M. Jadwat | > |
| Round 6 |
|---|
| Fri | Apr 17 | 1998 | | Manly Warringah Sea Eagles | 28 | - | 4 | Brisbane Broncos | Brookvale | 13,194 | S. Clark | > |
| Fri | 17 | 1998 | | Sydney City Roosters | 50 | - | 12 | Adelaide Rams | SFS | 6,200 | R. Lawrence | > |
| Sat | 18 | 1998 | | Canberra Raiders | 20 | - | 22 | Illawarra Steelers | Bruce | 8,248 | S. Hampstead | > |
| Sat | 18 | 1998 | | Cronulla Sutherland Sharks | 10 | - | 11 | Balmain Tigers | Shark Park | 16,598 | B. Harrigan | > |
| Sat | 18 | 1998 | | North Queensland Cowboys | 17 | - | 4 | Newcastle Knights | Malanda | 18,428 | T. Mander | > |
| Sun | 19 | 1998 | | Canterbury Bankstown Bulldogs | 56 | - | 10 | Gold Coast Chargers | Belmore | 5,175 | M. Hewitt | > |
| Sun | 19 | 1998 | | North Sydney Bears | 44 | - | 26 | Auckland Warriors | North Sydney | 10,945 | P. McBlane | > |
| Sun | 19 | 1998 | | Parramatta Eels | 22 | - | 32 | Melbourne Storm | Parramatta | 15,434 | B. Grant | > |
| Sun | 19 | 1998 | | Penrith Panthers | 24 | - | 30 | St George Dragons | Penrith | 12,227 | P. Simpkins | > |
| Sun | 19 | 1998 | | South Sydney Rabbitohs | 41 | - | 10 | Western Suburbs Magpies | SFS | 6,925 | E. Ward | > |
| Round 7 |
|---|
| Sat | Apr 25 | 1998 | | Adelaide Rams | 12 | - | 22 | Cronulla Sutherland Sharks | Adelaide | 8,472 | M. Hewitt | > |
| Sat | 25 | 1998 | | North Queensland Cowboys | 16 | - | 50 | Sydney City Roosters | Malanda | 21,027 | P. Simpkins | > |
| Sat | 25 | 1998 | | Melbourne Storm | 22 | - | 14 | Penrith Panthers | Olympic Park | 10,500 | P. McBlane | > |
| Sat | 25 | 1998 | | Balmain Tigers | 10 | - | 26 | Canterbury Bankstown Bulldogs | Leichhardt | 18,485 | S. Clark | > |
| Sun | 26 | 1998 | | Auckland Warriors | 14 | - | 38 | Newcastle Knights | Ericsson | 9,420 | E. Ward | > |
| Sun | 26 | 1998 | | Brisbane Broncos | 60 | - | 6 | North Sydney Bears | ANZ | 18,791 | B. Harrigan | > |
| Sun | 26 | 1998 | | Gold Coast Chargers | 12 | - | 24 | Canberra Raiders | Carrara | 5,139 | B. Grant | > |
| Sun | 26 | 1998 | | Illawarra Steelers | 20 | - | 12 | Parramatta Eels | WIN | 9,119 | T. Mander | > |
| Sun | 26 | 1998 | | Manly Warringah Sea Eagles | 22 | - | 18 | South Sydney Rabbitohs | Brookvale | 10,543 | M. Jadwat | > |
| Sun | 26 | 1998 | | Western Suburbs Magpies | 8 | - | 12 | St George Dragons | Campbelltown | 9,036 | S. Hampstead | > |
| Round 8 |
|---|
| Fri | May 1 | 1998 | | Canberra Raiders | 22 | - | 12 | Balmain Tigers | Bruce | 9,211 | T. Mander | > |
| Fri | 1 | 1998 | | Melbourne Storm | 54 | - | 16 | Western Suburbs Magpies | Olympic Park | 11,200 | E. Ward | > |
| Fri | 1 | 1998 | | Newcastle Knights | 6 | - | 26 | Brisbane Broncos | Marathon | 27,119 | B. Harrigan | > |
| Sat | 2 | 1998 | | Cronulla Sutherland Sharks | 16 | - | 8 | North Queensland Cowboys | Shark Park | 5,978 | S. Clark | > |
| Sat | 2 | 1998 | | Penrith Panthers | 38 | - | 14 | Illawarra Steelers | Penrith | 6,154 | M. Hewitt | > |
| Sat | 2 | 1998 | | Sydney City Roosters | 22 | - | 4 | Auckland Warriors | SFS | 5,308 | P. McBlane | > |
| Sun | 3 | 1998 | | Canterbury Bankstown Bulldogs | 30 | - | 4 | Adelaide Rams | Belmore | 5,041 | S. Hampstead | > |
| Sun | 3 | 1998 | | North Sydney Bears | 32 | - | 8 | Manly Warringah Sea Eagles | North Sydney | 11,612 | P. Simpkins | > |
| Sun | 3 | 1998 | | Parramatta Eels | 24 | - | 2 | Gold Coast Chargers | Parramatta | 6,063 | M. Jadwat | > |
| Sun | 3 | 1998 | | St George Dragons | 20 | - | 14 | South Sydney Rabbitohs | Kogarah | 5,083 | B. Grant | > |
| Round 9 |
|---|
| Fri | May 8 | 1998 | | Auckland Warriors | 8 | - | 20 | Cronulla Sutherland Sharks | Ericsson | 9,856 | B. Grant | > |
| Fri | 8 | 1998 | | Adelaide Rams | 18 | - | 24 | Canberra Raiders | Adelaide | 6,500 | M. Jadwat | > |
| Fri | 8 | 1998 | | Balmain Tigers | 18 | - | 21 | Parramatta Eels | Leichhardt | 18,117 | P. Simpkins | > |
| Fri | 8 | 1998 | | Melbourne Storm | 14 | - | 18 | St George Dragons | Olympic Park | 13,252 | B. Harrigan | > |
| Sat | 9 | 1998 | | Gold Coast Chargers | 26 | - | 12 | Penrith Panthers | Carrara | 3,774 | E. Ward | > |
| Sat | 9 | 1998 | | Illawarra Steelers | 42 | - | 20 | Western Suburbs Magpies | WIN | 7,636 | P. McBlane | > |
| Sat | 9 | 1998 | | North Queensland Cowboys | 18 | - | 24 | Canterbury Bankstown Bulldogs | Malanda | 15,288 | M. Hewitt | > |
| Sun | 10 | 1998 | | Brisbane Broncos | 12 | - | 26 | Sydney City Roosters | ANZ | 19,346 | T. Mander | > |
| Sun | 10 | 1998 | | Manly Warringah Sea Eagles | 16 | - | 50 | Newcastle Knights | Brookvale | 13,048 | S. Clark | > |
| Sun | 10 | 1998 | | South Sydney Rabbitohs | 14 | - | 26 | North Sydney Bears | SFS | 5,150 | S. Hampstead | > |
| Round 10 |
|---|
| Fri | May 15 | 1998 | | Newcastle Knights | 16 | - | 14 | North Sydney Bears | Marathon | 13,021 | T. Mander | > |
| Fri | 15 | 1998 | | South Sydney Rabbitohs | 6 | - | 14 | Melbourne Storm | SFS | 5,876 | P. McBlane | > |
| Sat | 16 | 1998 | | Canterbury Bankstown Bulldogs | 6 | - | 20 | Auckland Warriors | Belmore | 5,224 | S. Clark | > |
| Sat | 16 | 1998 | | Cronulla Sutherland Sharks | 20 | - | 10 | Brisbane Broncos | Shark Park | 10,582 | P. Simpkins | > |
| Sat | 16 | 1998 | | Parramatta Eels | 10 | - | 2 | Adelaide Rams | Pioneer | 7,514 | M. Hewitt | > |
| Sat | 16 | 1998 | | St George Dragons | 32 | - | 16 | Illawarra Steelers | Kogarah | 6,296 | S. Hampstead | > |
| Sun | 17 | 1998 | | Canberra Raiders | 50 | - | 12 | North Queensland Cowboys | Bruce | 8,291 | B. Grant | > |
| Sun | 17 | 1998 | | Penrith Panthers | 32 | - | 18 | Balmain Tigers | Penrith | 9,147 | B. Harrigan | > |
| Sun | 17 | 1998 | | Sydney City Roosters | 44 | - | 24 | Manly Warringah Sea Eagles | SFS | 12,796 | E. Ward | > |
| Sun | 17 | 1998 | | Western Suburbs Magpies | 24 | - | 14 | Gold Coast Chargers | Campbelltown | 5,218 | M. Jadwat | > |
| Round 11 |
|---|
| Sat | May 23 | 1998 | | Adelaide Rams | 35 | - | 18 | Penrith Panthers | Adelaide | 7,387 | M. Jadwat | > |
| Sat | 23 | 1998 | | Balmain Tigers | 20 | - | 12 | Western Suburbs Magpies | Leichhardt | 7,640 | P. McBlane | > |
| Sat | 23 | 1998 | | Gold Coast Chargers | 16 | - | 30 | St George Dragons | Carrara | 7,964 | M. Oaten | > |
| Sat | 23 | 1998 | | North Queensland Cowboys | 12 | - | 29 | Parramatta Eels | Malanda | 17,361 | E. Ward | > |
| Sun | 24 | 1998 | | Auckland Warriors | 25 | - | 14 | Canberra Raiders | Ericsson | 8,847 | S. Hampstead | > |
| Sun | 24 | 1998 | | Brisbane Broncos | 40 | - | 12 | Canterbury Bankstown Bulldogs | ANZ | 15,407 | B. Grant | > |
| Sun | 24 | 1998 | | Manly Warringah Sea Eagles | 32 | - | 12 | Cronulla Sutherland Sharks | Brookvale | 10,240 | M. Hewitt | > |
| Sun | 24 | 1998 | | Melbourne Storm | 14 | - | 14 | Illawarra Steelers | Olympic Park | 9,018 | P. Simpkins | > |
| Sun | 24 | 1998 | | Newcastle Knights | 20 | - | 12 | South Sydney Rabbitohs | Marathon | 21,357 | S. Chiddy | > |
| Sun | 24 | 1998 | | North Sydney Bears | 38 | - | 12 | Sydney City Roosters | North Sydney | 13,099 | S. Clark | > |
| Round 12 |
|---|
| Fri | May 29 | 1998 | | Penrith Panthers | 28 | - | 36 | North Queensland Cowboys | Penrith | 8,685 | M. Oaten | > |
| Fri | 29 | 1998 | | Sydney City Roosters | 4 | - | 20 | Newcastle Knights | SFS | 15,786 | B. Harrigan | > |
| Sat | 30 | 1998 | | Cronulla Sutherland Sharks | 16 | - | 12 | North Sydney Bears | Shark Park | 11,143 | B. Grant | > |
| Sat | 30 | 1998 | | Parramatta Eels | 14 | - | 6 | Auckland Warriors | Parramatta | 13,218 | M. Hewitt | > |
| Sat | 30 | 1998 | | St George Dragons | 28 | - | 2 | Balmain Tigers | Kogarah | 14,002 | S. Hampstead | > |
| Sun | 31 | 1998 | | Canberra Raiders | 24 | - | 18 | Brisbane Broncos | Bruce | 14,728 | S. Clark | > |
| Sun | 31 | 1998 | | Illawarra Steelers | 18 | - | 12 | South Sydney Rabbitohs | WIN | 8,174 | M. Jadwat | > |
| Sun | 31 | 1998 | | Melbourne Storm | 62 | - | 6 | Gold Coast Chargers | Olympic Park | 7,454 | P. McBlane | > |
| Sun | 31 | 1998 | | Western Suburbs Magpies | 36 | - | 24 | Adelaide Rams | Campbelltown | 6,392 | S. Chiddy | > |
| Sun | 31 | 1998 | | Canterbury Bankstown Bulldogs | 28 | - | 2 | Manly Warringah Sea Eagles | Belmore | 10,152 | E. Ward | > |
| Round 13 |
|---|
| Sat | Jun 6 | 1998 | | Adelaide Rams | 22 | - | 20 | St George Dragons | Adelaide | 7,506 | P. McBlane | > |
| Sat | 6 | 1998 | | Cronulla Sutherland Sharks | 16 | - | 18 | Newcastle Knights | Shark Park | 14,583 | S. Hampstead | > |
| Sat | 6 | 1998 | | Gold Coast Chargers | 10 | - | 32 | Illawarra Steelers | Carrara | 3,762 | E. Ward | > |
| Sat | 6 | 1998 | | North Queensland Cowboys | 40 | - | 10 | Western Suburbs Magpies | Malanda | 10,840 | M. Jadwat | > |
| Sun | 7 | 1998 | | Auckland Warriors | 15 | - | 14 | Penrith Panthers | Ericsson | 7,934 | K. Jeffes | > |
| Sun | 7 | 1998 | | Balmain Tigers | 16 | - | 25 | Melbourne Storm | Leichhardt | 6,979 | M. Oaten | > |
| Sun | 7 | 1998 | | Brisbane Broncos | 16 | - | 20 | Parramatta Eels | ANZ | 18,163 | B. Grant | > |
| Sun | 7 | 1998 | | South Sydney Rabbitohs | 6 | - | 30 | Sydney City Roosters | SFS | 9,215 | S. Chiddy | > |
| Sun | 7 | 1998 | | Canterbury Bankstown Bulldogs | 4 | - | 38 | North Sydney Bears | Belmore | 9,427 | S. Clark | > |
| Mon | 8 | 1998 | | Manly Warringah Sea Eagles | 12 | - | 24 | Canberra Raiders | Brookvale | 10,941 | T. Mander | > |
| Round 14 |
|---|
| Fri | Jun 12 | 1998 | | Sydney City Roosters | 18 | - | 14 | Cronulla Sutherland Sharks | SFS | 9,287 | B. Harrigan | > |
| Sat | 13 | 1998 | | Melbourne Storm | 24 | - | 4 | Adelaide Rams | Olympic Park | 8,293 | M. Jadwat | > |
| Sat | 13 | 1998 | | Parramatta Eels | 17 | - | 14 | Manly Warringah Sea Eagles | Parramatta | 17,089 | S. Clark | > |
| Sat | 13 | 1998 | | Penrith Panthers | 4 | - | 44 | Brisbane Broncos | Penrith | 11,637 | S. Hampstead | > |
| Sat | 13 | 1998 | | Western Suburbs Magpies | 18 | - | 16 | Auckland Warriors | Campbelltown | 5,933 | E. Ward | > |
| Sun | 14 | 1998 | | Illawarra Steelers | 16 | - | 38 | Balmain Tigers | WIN | 10,076 | P. McBlane | > |
| Sun | 14 | 1998 | | Newcastle Knights | 12 | - | 4 | Canterbury Bankstown Bulldogs | Marathon | 21,717 | T. Mander | > |
| Sun | 14 | 1998 | | North Sydney Bears | 34 | - | 22 | Canberra Raiders | North Sydney | 12,367 | B. Grant | > |
| Sun | 14 | 1998 | | St George Dragons | 16 | - | 14 | North Queensland Cowboys | Kogarah | 9,486 | S. Chiddy | > |
| Sun | 14 | 1998 | | South Sydney Rabbitohs | 14 | - | 16 | Gold Coast Chargers | SFS | 3,980 | M. Oaten | > |
| Round 15 |
|---|
| Sat | Jun 20 | 1998 | | Adelaide Rams | 4 | - | 39 | Illawarra Steelers | Bennett | 5,153 | S. Chiddy | > |
| Sat | 20 | 1998 | | Cronulla Sutherland Sharks | 30 | - | 12 | South Sydney Rabbitohs | Shark Park | 8,849 | E. Ward | > |
| Sat | 20 | 1998 | | Parramatta Eels | 25 | - | 12 | North Sydney Bears | Parramatta | 12,313 | P. McBlane | > |
| Sat | 20 | 1998 | | Gold Coast Chargers | 4 | - | 18 | Balmain Tigers | Carrara | 5,227 | M. Jadwat | > |
| Sat | 20 | 1998 | | North Queensland Cowboys | 8 | - | 10 | Melbourne Storm | Malanda | 24,464 | B. Grant | > |
| Sun | 21 | 1998 | | Auckland Warriors | 31 | - | 14 | St George Dragons | Ericsson | 8,919 | T. Mander | > |
| Sun | 21 | 1998 | | Brisbane Broncos | 56 | - | 4 | Western Suburbs Magpies | ANZ | 12,415 | K. Jeffes | > |
| Sun | 21 | 1998 | | Canberra Raiders | 22 | - | 12 | Newcastle Knights | Bruce | 7,686 | S. Clark | > |
| Sun | 21 | 1998 | | Canterbury Bankstown Bulldogs | 22 | - | 10 | Sydney City Roosters | Belmore | 8,926 | S. Hampstead | > |
| Sun | 21 | 1998 | | Manly Warringah Sea Eagles | 22 | - | 4 | Penrith Panthers | Brookvale | 5,187 | M. Oaten | > |
| Round 16 |
|---|
| Fri | Jun 26 | 1998 | | St George Dragons | 18 | - | 30 | Brisbane Broncos | Kogarah | 16,258 | S. Clark | > |
| Sat | 27 | 1998 | | Cronulla Sutherland Sharks | 28 | - | 6 | Canterbury Bankstown Bulldogs | Shark Park | 10,243 | K. Jeffes | > |
| Sat | 27 | 1998 | | Gold Coast Chargers | 12 | - | 40 | Adelaide Rams | Carrara | 3,897 | P. Simpkins | > |
| Sat | 27 | 1998 | | Melbourne Storm | 21 | - | 24 | Auckland Warriors | Olympic Park | 13,127 | M. Jadwat | > |
| Sat | 27 | 1998 | | Western Suburbs Magpies | 30 | - | 45 | Manly Warringah Sea Eagles | Campbelltown | 7,712 | T. Mander | > |
| Sun | 28 | 1998 | | Balmain Tigers | 12 | - | 16 | South Sydney Rabbitohs | Leichhardt | 9,620 | B. Grant | > |
| Sun | 28 | 1998 | | Illawarra Steelers | 24 | - | 18 | North Queensland Cowboys | WIN | 6,558 | S. Hampstead | > |
| Sun | 28 | 1998 | | Newcastle Knights | 36 | - | 12 | Parramatta Eels | Marathon | 25,094 | B. Harrigan | > |
| Sun | 28 | 1998 | | North Sydney Bears | 30 | - | 22 | Penrith Panthers | North Sydney | 6,733 | S. Chiddy | > |
| Mon | 29 | 1998 | | Sydney City Roosters | 40 | - | 12 | Canberra Raiders | SFS | 13,683 | S. Clark | > |
| Round 17 |
|---|
| Fri | Jul 3 | 1998 | | Brisbane Broncos | 34 | - | 16 | Melbourne Storm | ANZ | 35,119 | B. Harrigan | > |
| Fri | 3 | 1998 | | Adelaide Rams | 52 | - | 0 | Balmain Tigers | Hindmarsh | 7,351 | P. Simpkins | > |
| Sat | 4 | 1998 | | Auckland Warriors | 14 | - | 17 | Illawarra Steelers | Ericsson | 12,623 | T. Mander | > |
| Sat | 4 | 1998 | | North Queensland Cowboys | 14 | - | 4 | Gold Coast Chargers | Malanda | 7,127 | M. Jadwat | > |
| Sat | 4 | 1998 | | Penrith Panthers | 13 | - | 13 | Newcastle Knights | Penrith | 12,284 | B. Grant | > |
| Sat | 4 | 1998 | | South Sydney Rabbitohs | 8 | - | 30 | Canterbury Bankstown Bulldogs | SFS | 5,822 | S. Chiddy | > |
| Sun | 5 | 1998 | | Canberra Raiders | 16 | - | 12 | Cronulla Sutherland Sharks | Bruce | 10,588 | P. McBlane | > |
| Sun | 5 | 1998 | | Manly Warringah Sea Eagles | 34 | - | 12 | St George Dragons | Brookvale | 12,590 | K. Jeffes | > |
| Sun | 5 | 1998 | | North Sydney Bears | 32 | - | 18 | Western Suburbs Magpies | North Sydney | 6,602 | S. Hampstead | > |
| Sun | 5 | 1998 | | Sydney City Roosters | 30 | - | 12 | Parramatta Eels | SFS | 13,864 | S. Clark | > |
| Round 18 |
|---|
| Fri | Jul 10 | 1998 | | Melbourne Storm | 22 | - | 12 | Manly Warringah Sea Eagles | Olympic Park | 13,120 | B. Grant | > |
| Fri | 10 | 1998 | | Parramatta Eels | 22 | - | 12 | Cronulla Sutherland Sharks | Parramatta | 11,098 | T. Mander | > |
| Sat | 11 | 1998 | | Gold Coast Chargers | 31 | - | 18 | Auckland Warriors | Carrara | 5,490 | S. Hampstead | > |
| Sat | 11 | 1998 | | Balmain Tigers | 18 | - | 0 | North Queensland Cowboys | Leichhardt | 10,653 | K. Jeffes | > |
| Sat | 11 | 1998 | | Penrith Panthers | 24 | - | 18 | Sydney City Roosters | Penrith | 11,156 | S. Chiddy | > |
| Sun | 12 | 1998 | | Canberra Raiders | 22 | - | 24 | Canterbury Bankstown Bulldogs | Bruce | 9,610 | S. Clark | > |
| Sun | 12 | 1998 | | Illawarra Steelers | 12 | - | 18 | Brisbane Broncos | WIN | 12,018 | P. McBlane | > |
| Sun | 12 | 1998 | | St George Dragons | 22 | - | 14 | North Sydney Bears | Kogarah | 8,634 | B. Harrigan | > |
| Sun | 12 | 1998 | | South Sydney Rabbitohs | 18 | - | 34 | Adelaide Rams | SFS | 4,060 | M. Jadwat | > |
| Sun | 12 | 1998 | | Western Suburbs Magpies | 17 | - | 18 | Newcastle Knights | Campbelltown | 8,010 | P. Simpkins | > |
| Round 19 |
|---|
| Fri | Jul 17 | 1998 | | Auckland Warriors | 21 | - | 20 | Balmain Tigers | Ericsson | 8,321 | B. Grant | > |
| Fri | 17 | 1998 | | North Sydney Bears | 34 | - | 10 | Melbourne Storm | North Sydney | 11,775 | S. Clark | > |
| Sat | 18 | 1998 | | Manly Warringah Sea Eagles | 22 | - | 12 | Illawarra Steelers | Brookvale | 5,631 | S. Hampstead | > |
| Sat | 18 | 1998 | | Canterbury Bankstown Bulldogs | 6 | - | 7 | Parramatta Eels | Belmore | 9,541 | B. Harrigan | > |
| Sat | 18 | 1998 | | Cronulla Sutherland Sharks | 14 | - | 14 | Penrith Panthers | Shark Park | 4,048 | K. Jeffes | > |
| Sat | 18 | 1998 | | North Queensland Cowboys | 14 | - | 10 | Adelaide Rams | Malanda | 11,340 | S. Chiddy | > |
| Sun | 19 | 1998 | | Brisbane Broncos | 44 | - | 10 | Gold Coast Chargers | ANZ | 12,740 | M. Jadwat | > |
| Sun | 19 | 1998 | | Canberra Raiders | 46 | - | 16 | South Sydney Rabbitohs | Bruce | 7,488 | P. Simpkins | > |
| Sun | 19 | 1998 | | Newcastle Knights | 28 | - | 22 | St George Dragons | Marathon | 25,475 | P. McBlane | > |
| Sun | 19 | 1998 | | Sydney City Roosters | 62 | - | 4 | Western Suburbs Magpies | SFS | 5,644 | T. Mander | > |
| Round 20 |
|---|
| Fri | Jul 24 | 1998 | | Melbourne Storm | 32 | - | 16 | Newcastle Knights | Olympic Park | 14,214 | B. Harrigan | > |
| Sat | 25 | 1998 | | Illawarra Steelers | 6 | - | 32 | North Sydney Bears | WIN | 6,847 | P. Simpkins | > |
| Sat | 25 | 1998 | | Balmain Tigers | 10 | - | 10 | Brisbane Broncos | Leichhardt | 7,159 | T. Mander | > |
| Sat | 25 | 1998 | | Gold Coast Chargers | 6 | - | 30 | Manly Warringah Sea Eagles | Carrara | 8,721 | M. Hewitt | > |
| Sat | 25 | 1998 | | North Queensland Cowboys | 16 | - | 22 | South Sydney Rabbitohs | Malanda | 10,409 | S. Hampstead | > |
| Sat | 25 | 1998 | | Western Suburbs Magpies | 8 | - | 38 | Cronulla Sutherland Sharks | Campbelltown | 7,531 | M. Jadwat | > |
| Sun | 26 | 1998 | | Adelaide Rams | 22 | - | 20 | Auckland Warriors | Hindmarsh | 7,445 | K. Jeffes | > |
| Sun | 26 | 1998 | | Parramatta Eels | 8 | - | 22 | Canberra Raiders | Parramatta | 10,085 | P. McBlane | > |
| Sun | 26 | 1998 | | Penrith Panthers | 26 | - | 18 | Canterbury Bankstown Bulldogs | Penrith | 6,404 | B. Grant | > |
| Sun | 26 | 1998 | | St George Dragons | 22 | - | 12 | Sydney City Roosters | Kogarah | 5,173 | S. Clark | > |