1968 Election - Details of By-Elections
| District |
Nominations |
Polling |
Cause |
Elected Members |
| Lake Macquarie |
24 Mar 1969 |
19 Apr 1969 |
Death |
Mervyn Leslie Hunter (ALP) |
| Murrumbidgee |
23 Jan 1970 |
14 Feb 1970 |
Resignation - Federal contest |
Alan Robert Lindsay Gordon (ALP) |
| Randwick |
23 Jan 1970 |
14 Feb 1970 |
Resignation - Federal contest |
Laurence John Brereton (ALP) |
| Upper Hunter |
23 Jan 1970 |
14 Feb 1970 |
Resignation - Federal contest |
Colin Murray Fisher (CP) |
| Georges River |
28 Aug 1970 |
19 Sep 1970 |
Death |
Francis John Walker (ALP) |