| NBL champions | League champions | Runners-up | Finals berth |
| Season | Tier | League | Regular season | Post-season | Head coach | Captain | Club MVP | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Finish | Played | Wins | Losses | Win % | |||||||
| Illawarra Hawks | |||||||||||
| 1979 | 1 | NBL | 8th | 18 | 5 | 13 | .278 | Did not qualify | Joe Farrugia | Bob Kubbinga | not awarded |
| 1980 | 1 | NBL | 6th | 22 | 13 | 9 | .591 | Did not qualify | Adrian Hurley | Gordie McLeod | not awarded |
| 1981 | 1 | NBL | 8th | 22 | 9 | 13 | .409 | Did not qualify | Joe Farrugia | Gordie McLeod | not awarded |
| 1982 | 1 | NBL | 9th | 26 | 11 | 15 | .423 | Did not qualify | Tom Pottenger | Gordie McLeod | not awarded |
| 1983 | 1 | NBL | 7th | 22 | 4 | 18 | .182 | Did not qualify | Charlie Ammit | Mike Jones | not awarded |
| 1984 | 1 | NBL | 4th | 24 | 13 | 11 | .542 | Lost elimination final (Newcastle) 101–108 | Charlie Ammit | Gordie McLeod | not awarded |
| 1985 | 1 | NBL | 9th | 26 | 10 | 16 | .385 | Did not qualify | Ted Weston | Gordie McLeod | not awarded |
| 1986 | 1 | NBL | 5th | 26 | 15 | 11 | .577 | Won elimination final (West Sydney) 105–86 Lost semifinal (Adelaide) 92–116 |
Dave Lindstrom | Gordie McLeod | not awarded |
| 1987 | 1 | NBL | 3rd | 26 | 20 | 6 | .769 | Won elimination final (North Melbourne) 105–97 Lost semifinals (Brisbane) 1–2 |
Dave Lindstrom | Gordie McLeod | not awarded |
| 1988 | 1 | NBL | 7th | 24 | 11 | 13 | .458 | Did not qualify | Dave Lindstrom | Gordie McLeod | not awarded |
| 1989 | 1 | NBL | 11th | 24 | 7 | 17 | .292 | Did not qualify | Dave Lindstrom | Chuck Harmison | Norman Taylor |
| 1990 | 1 | NBL | 8th | 26 | 13 | 13 | .500 | Did not qualify | Dave Lindstrom | Chuck Harmison | Norman Taylor |
| 1991 | 1 | NBL | 13th | 26 | 6 | 20 | .231 | Did not qualify | Dave Lindstrom | Chuck Harmison | Norman Taylor |
| 1992 | 1 | NBL | 5th | 24 | 13 | 11 | .542 | Lost quarterfinals (North Melbourne) 0–2 | Dave Lindstrom | Chuck Harmison | Doug Overton |
| 1993 | 1 | NBL | 6th | 26 | 15 | 11 | .577 | Lost quarterfinals (Melbourne) 0–2 | Alan Black | Chuck Harmison | Melvin Thomas |
| 1994 | 1 | NBL | 8th | 26 | 13 | 13 | .500 | Lost quarterfinals (Melbourne) 0–2 | Alan Black | Chuck Harmison | Melvin Thomas |
| 1995 | 1 | NBL | 7th | 26 | 14 | 12 | .538 | Lost quarterfinals (S.E. Melbourne) 1–2 | Alan Black | Chuck Harmison | Melvin Thomas |
| 1996 | 1 | NBL | 10th | 26 | 9 | 17 | .346 | Did not qualify | Brendan Joyce | Chuck Harmison | Terry Johnson |
| 1997 | 1 | NBL | 11th | 30 | 7 | 23 | .233 | Did not qualify | Brendan Joyce | Matt Zauner | Clayton Ritter |
| Wollongong Hawks | |||||||||||
| 1998 | 1 | NBL | 6th | 30 | 14 | 16 | .467 | Lost elimination finals (Perth) 0–2 | Brendan Joyce | Clayton Ritter | Clayton Ritter |
| 1998–99 | 1 | NBL | 3rd | 26 | 16 | 10 | .615 | Lost qualifying finals (Victoria) 0–2 Lost semifinals (Adelaide) 0–2 |
Brendan Joyce | Clayton Ritter | C. J. Bruton |
| 1999–2000 | 1 | NBL | 7th | 28 | 11 | 17 | .393 | Did not qualify | Brendan Joyce | Eric Cooks | Glen Saville Melvin Thomas |
| 2000–01 | 1 | NBL | 4th | 28 | 21 | 7 | .750 | Won qualifying finals (Perth) 2–1 Won semifinals (Adelaide) 2–1 Won NBL finals (Townsville) 2–1 |
Brendan Joyce | Mat Campbell Glen Saville |
Glen Saville |
| 2001–02 | 1 | NBL | 4th | 30 | 16 | 14 | .533 | Lost qualifying finals (Adelaide) 0–2 | Brendan Joyce | Mat Campbell Glen Saville |
Glen Saville |
| 2002–03 | 1 | NBL | 4th | 30 | 18 | 12 | .600 | Won qualifying finals (Townsville) 2–0 Lost semifinals (Perth) 0–2 |
Brendan Joyce | Mat Campbell Glen Saville |
Glen Saville |
| 2003–04 | 1 | NBL | 2nd | 33 | 25 | 8 | .758 | Lost semifinals (West Sydney) 0–2 | Brendan Joyce | Mat Campbell | Glen Saville |
| 2004–05 | 1 | NBL | 2nd | 32 | 20 | 12 | .625 | Won semifinals (Townsville) 2–0 Lost NBL finals (Sydney) 0–3 |
Brendan Joyce | Mat Campbell | Glen Saville |
| 2005–06 | 1 | NBL | 3rd | 32 | 19 | 13 | .594 | Lost quarterfinal (Perth) 101–121 | Brendan Joyce | Rotating captaincy | Cortez Groves |
| 2006–07 | 1 | NBL | 9th | 33 | 11 | 22 | .333 | Did not qualify | Brendan Joyce Eric Cooks |
Glen Saville | Adam Ballinger |
| 2007–08 | 1 | NBL | 11th | 30 | 9 | 21 | .300 | Did not qualify | Eric Cooks | Mat Campbell | Kavossy Franklin |
| 2008–09 | 1 | NBL | 7th | 30 | 11 | 19 | .367 | Did not qualify | Eric Cooks | Mat Campbell | Glen Saville |
| 2009–10 | 1 | NBL | 2nd | 28 | 16 | 12 | .571 | Won semifinals (Townsville) 2–1 Lost NBL finals (Perth) 1–2 |
Gordie McLeod | Mat Campbell | Larry Davidson |
| 2010–11 | 1 | NBL | 5th | 28 | 15 | 13 | .536 | Did not qualify | Gordie McLeod | Mat Campbell | Gary Ervin |
| 2011–12 | 1 | NBL | 8th | 28 | 9 | 19 | .321 | Did not qualify | Gordie McLeod | Mat Campbell | Oscar Forman |
| 2012–13 | 1 | NBL | 3rd | 28 | 13 | 15 | .464 | Lost semifinals (Perth) 0–2 | Gordie McLeod | Oscar Forman | Adris Deleon |
| 2013–14 | 1 | NBL | 4th | 28 | 13 | 15 | .464 | Lost semifinals (Perth) 0–2 | Gordie McLeod | Oscar Forman | Rotnei Clarke |
| 2014–15 | 1 | NBL | 8th | 28 | 6 | 22 | .214 | Did not qualify | Gordie McLeod | Oscar Forman | Tim Coenraad |
| Illawarra Hawks | |||||||||||
| 2015–16 | 1 | NBL | 3rd | 28 | 17 | 11 | .607 | Lost semifinals (Perth) 1–2 | Rob Beveridge | Oscar Forman | Kevin Lisch |
| 2016–17 | 1 | NBL | 4th | 28 | 15 | 13 | .536 | Won semifinals (Adelaide) 2–1 Lost NBL finals (Perth) 0–3 |
Rob Beveridge | Oscar Forman | Rotnei Clarke |
| 2017–18 | 1 | NBL | 5th | 28 | 12 | 16 | .429 | Did not qualify | Rob Beveridge | Kevin White | Demitrius Conger |
| 2018–19 | 1 | NBL | 7th | 28 | 12 | 16 | .429 | Did not qualify | Rob Beveridge | Kevin White | Todd Blanchfield |
| 2019–20 | 1 | NBL | 9th | 28 | 5 | 23 | .179 | Did not qualify | Matt Flinn | David Andersen Todd Blanchfield |
Todd Blanchfield |
| 2020–21 | 1 | NBL | 3rd | 36 | 20 | 16 | .556 | Lost semifinals (Perth) 1–2 | Brian Goorjian | Andrew Ogilvy | Tyler Harvey |
| 2021–22 | 1 | NBL | 2nd | 28 | 19 | 9 | .679 | Lost semifinals (Sydney) 0–2 | Brian Goorjian | Andrew Ogilvy | Duop Reath |
| 2022–23 | 1 | NBL | 10th | 28 | 3 | 25 | .107 | Did not qualify | Jacob Jackomas | Sam Froling Tyler Harvey |
Sam Froling |
| 2023–24 | 1 | NBL | 4th | 28 | 14 | 14 | .500 | Lost seeding qualifier (Tasmania) 76–92 Won play-in game (New Zealand) 88–85 Lost semifinals (Melbourne) 1–2 |
Jacob Jackomas Justin Tatum |
Sam Froling Tyler Harvey |
Gary Clark |
| Regular season record | 1260 | 588 | 672 | .467 | 0 regular season champions | ||||||
| Finals record | 74 | 23 | 51 | .311 | 1 NBL championships | ||||||
As of the end of the 2023–24 season
*Note: In 1983 and 1984, the NBL was split into Eastern and Western divisions during the regular season.