| Preliminary Round (2/18) | ||||
| # | Date | Time | Matchup | Location |
| 1 | 18 Feb 1998 | 19:00 | #1 St. Joseph (17-3) - BYE | St. Joseph HS |
| 2 | 18 Feb 1998 | 16:00 | #16 East Brunswick Tech (11-10) 47 - 60 #17 St. Peter (7-11) | East Brunswick Tech HS |
| 3 | 18 Feb 1998 | 19:00 | #8 Carteret (16-3) 70 - 42 #25 South Plainfield (2-16) | Carteret HS |
| 4 | 18 Feb 1998 | 16:00 | #9 Colonia (14-6) 72 - 45 #24 Perth Amboy Tech (9-10) | Coloinia HS |
| 5 | 18 Feb 1998 | 19:00 | #4 North Brunswick (16-3) - BYE | North Brunswick HS |
| 6 | 18 Feb 1998 | 19:00 | #13 East Brunswick (4-17) 60 - 63 2OT #20 J.P. Stevens (5-16) | East Brunswick HS |
| 7 | 18 Feb 1998 | 19:00 | #5 Highland Park (15-1) 57 - 41 #28 Dunellen (5-13) | Highland Park HS |
| 8 | 18 Feb 1998 | 19:00 | #12 Woodbridge (9-11) 57 - 54 #21 New Brunswick (5-15) | Woodbridge HS |
| 9 | 18 Feb 1998 | 19:00 | #3 Old Bridge (14-4) - BYE | Old Bridge HS |
| 10 | 18 Feb 1998 | 16:00 | #14 Edison (9-11) 63 - 47 #19 South Amboy (11-9) | Edison HS |
| 11 | 18 Feb 1998 | 19:00 | #6 Perth Amboy (12-8) 79 - 32 #27 Monroe (5-15) | Perth Amboy HS |
| 12 | 18 Feb 1998 | 19:00 | #11 Piscataway (8-12) 65 - 55 #22 South River (8-11) | Piscataway HS |
| 13 | 18 Feb 1998 | 19:00 | #7 St. Mary S.A. (17-2) 83 - 35 #26 Metuchen (5-13) | St. Mary S.A. HS |
| 14 | 18 Feb 1998 | 19:00 | #10 South Brunswick (14-4) 64 - 42 #23 J.F. Kennedy (4-17) | South Brunswick HS |
| 15 | 18 Feb 1998 | 12:00 | #2 Sayreville (16-3) - BYE | Sayreville War Memorial HS |
| 16 | 18 Feb 1998 | 19:00 | #15 Bishop Ahr (9-12) 52 - 38 #18 Spotswood (9-9) | Bishop Ahr HS |
| First Round (2/20) | ||||
| # | Date | Time | Matchup | Location |
| 17 | 18 Feb 1998 | 19:00 | #1 St. Joseph (17-3) 72 - 60 #17 St. Peter (8-11) | St. Joseph HS |
| 18 | 18 Feb 1998 | 19:00 | #8 Carteret (17-3) 52 - 59 #9 Colonia (15-6) | Carteret HS |
| 19 | 18 Feb 1998 | 19:00 | #4 North Brunswick (16-3) 59 - 45 #20 J.P. Stevens (6-16) | North Brunswick HS |
| 20 | 18 Feb 1998 | 19:00 | #5 Highland Park (16-1) 58 - 34 #12 Woodbridge (10-11) | Highland Park HS |
| 21 | 18 Feb 1998 | 19:00 | #3 Old Bridge (14-4) 52 - 41 #14 Edison (10-11) | Old Bridge HS |
| 22 | 18 Feb 1998 | 19:00 | #6 Perth Amboy (13-8) 61 - 32 #11 Piscataway (9-12) | Perth Amboy HS |
| 23 | 18 Feb 1998 | 19:00 | #7 St. Mary S.A. (18-2) 53 - 52 #10 South Brunswick (15-4) | St. Mary S.A. HS |
| 24 | 18 Feb 1998 | 19:00 | #2 Sayreville (16-3) 76 - 59 #15 Bishop Ahr (10-12) | Sayreville HS |
| Quarterfinals (2/22) | ||||
| # | Date | Time | Matchup | Location |
| 25 | 22 Feb 1998 | 18:00 | #1 St. Joseph (18-3) 65 - 58 #9 Colonia (16-6) | Middlesex County College |
| 26 | 22 Feb 1998 | 16:30 | #4 North Brunswick (17-3) 72 - 48 #5 Highland Park (17-1) | Middlesex County College |
| 27 | 22 Feb 1998 | 12:00 | #3 Old Bridge (15-4) 40 - 56 #6 Perth Amboy (14-8) | Middlesex County College |
| 28 | 22 Feb 1998 | 13:30 | #2 Sayreville (17-3) 84 - 52 #7 St. Mary S.A. (19-2) | Middlesex County College |
| Semifinals (2/24 & 2/25) | ||||
| # | Date | Time | Matchup | Location |
| 29 | 25 Feb 1998 | 19:30 | #1 St. Joseph (19-3) 55 - 47 #4 North Brunswick (18-3) | Middlesex County College |
| 30 | 24 Feb 1998 | 19:30 | #2 Sayreville (18-3) 56 - 41 #6 Perth Amboy (15-8) | Middlesex County College |
| Championship (3/1) | ||||
| # | Date | Time | Matchup | Location |
| 31 | 1 Mar 1998 | 12:00 | #1 St. Joseph (20-3) 66 - 54 #2 Sayreville (19-3) | South Brunswick HS |
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