Elections to Wigan Council were held on 1 May 1975, with one third of the council up for the election - although only 21 seats were contested, as Labour were unopposed in Ward 12, 21 and 24. Labour suffered six losses on the night - five to the Conservatives and one to the Liberals - with a gain from the sole Independent in Ward 23 as consolation. Overall turnout fell by nearly a quarter, to 27%.[1]
This result had the following consequences for the total number of seats on the council after the elections:
| valign=top colspan="2" style="width: 230px" | Party | valign=top style="width: 30px" | Previous council | valign=top style="width: 30px" | New council |
|---|---|---|---|---|---|
| Labour | 66 | 61 | |||
| Conservatives | 5 | 10 | |||
| Liberals | 0 | 1 | |||
| Independent | 1 | 0 | |||
| Total | 72 | 72 | |||
| Working majority | |||||