1978 Election - Details of By-Elections
| District |
Nominations |
Polling |
Cause |
Elected Members |
| Castlereagh |
04 Feb 1980 |
23 Feb 1980 |
Resignation - Government Job |
James Lawrence Curran (ALP) |
| Bankstown |
18 Aug 1980 |
13 Sep 1980 |
Death |
Richard Charles Mochalski (ALP) |
| Ku-ring-gai |
18 Aug 1980 |
13 Sep 1980 |
Resignation - Other |
Nicholas Frank Greiner (LIB) |
| Murray |
18 Aug 1980 |
13 Sep 1980 |
Death |
*Timothy Andrew Fischer (CP) |
| Cessnock |
29 Jan 1981 |
21 Feb 1981 |
Resignation - Federal contest |
Stanley Thomas Neilly (ALP) |
| Maitland |
29 Jan 1981 |
21 Feb 1981 |
Resignation - Federal contest |
Peter Macquarie Toms (LIB) |
| Oxley |
29 Jan 1981 |
21 Feb 1981 |
Resignation - Federal contest |
Peter Maurice King (NCP) |
| Sturt |
29 Jan 1981 |
21 Feb 1981 |
Resignation - Other |
John William Sullivan (NCP) |