Before (end of 1977) (72 seats, Elections Centre)
Labour 56 · Conservative 14 · Other 1 · The Liberal Party 1
After (end of 1978) (72 seats, Elections Centre)
Labour 50 · Conservative 20 · The Liberal Party 1 · Other 1
Ward results
No. 1 (Wigan: Lindsay-Scholes-Whelley)1 seat · turnout 34.3%
| W. Pendleton | Labour | 1,980 |
| C. Giles | Conservative | 1,170 |
No. 10 (Leigh: Lilford-St. Josephs-St. Thomas)1 seat · turnout 40.3%
| G. Wyatt | Conservative | 2,042 |
| H. Smith | Labour | 1,528 |
No. 11 (Golborne: St. Thomas & Lowton)1 seat · turnout 40.7%
| N. Holt | Labour | 2,468 |
| T. Thompson | Conservative | 1,776 |
No. 12 (Golborne: Heath Park & Abram)1 seat · turnout 36.7%
| J. Hilton | Labour | 2,116 |
| J. Harrison | Conservative | 1,146 |
No. 13 (Ashton-In-Makerfield:north & West)1 seat · turnout 35.5%
| A. Heckles | Labour | 1,695 |
| B. Smith | Conservative | 1,003 |
No. 14 (Ashton-In-Makerfield:central & East)1 seat · turnout 32.5%
| S. Lea | Labour | 1,645 |
| M. Ball | Conservative | 1,257 |
No. 15 (Standish-With-Langtree & Shevington)1 seat · turnout 42.2%
| G. Pullin | Labour | 1,981 |
| E. Howard | Conservative | 1,911 |
| J. Pigot | LIB | 1,089 |
No. 16 (Aspull)1 seat · turnout 41.7%
| J. Wild | Conservative | 1,942 |
| A. Singer | Labour | 1,860 |
| K. Mason | LIB | 242 |
No. 17 (Atherton: North East)2 seats · turnout 34.0%
| J. Clarke | Labour | 2,590 |
| W. Murphy | Labour | 2,115 |
| M. Sharland | Conservative | 1,001 |
| B. France | Conservative | 895 |
No. 18 (Atherton: South West)1 seat · turnout 42.1%
| Don Williams | Conservative | 1,435 |
| J. Sumner | Labour | 1,296 |
No. 19 (Hindley: Central & North)1 seat · turnout 30.9%
| C. Priestley | Labour | 1,558 |
| L. McGreal | Conservative | 716 |
No. 2 (Wigan: Poolstock-Worsley Mesnes)2 seats · turnout 26.3%
| W. Brogan | Labour | 1,744 |
| H. Antill | Labour | 1,587 |
| C. Rogers | Conservative | 866 |
| R. Rogers | Conservative | 837 |
No. 20 (Hindley: South-East-West)1 seat · turnout 28.3%
| G Harrison | Labour | 1,720 |
| T. Whitfield | Conservative | 1,361 |
No. 21 (Ince-In-Makerfield)1 seat · turnout 31.9%
| R. Taylor | Labour | 2,553 |
| M. Jones | Conservative | 1,006 |
No. 22 (Orrell & Billinge)1 seat · turnout 35.7%
| J. Hitchen | Conservative | 2,723 |
| J. Whittle | Labour | 2,201 |
No. 23 (Tyldesley: Shakerley)1 seat · turnout 37.5%
| S. Little | Labour | 1,744 |
| L. Knowles | Conservative | 1,614 |
No. 24 (Tyldesley: Astley Green & Blackmoor)1 seat · turnout 41.4%
| S. Emerton | Conservative | 1,629 |
| R. Rawson | Labour | 1,567 |
No. 3 (Wigan: Gidlow-Swinley-Whitley)1 seat · turnout 34.2%
| H. Dowling | Conservative | 2,731 |
| M. Pendleton | Labour | 1,143 |
No. 4 (Wigan: Beech Hill & Marsh Green)1 seat · turnout 29.4%
| E. Naylor | Labour | 1,892 |
| Allan Atherton | Conservative | 869 |
No. 5 (Wigan: Highfield & Lamberhead)1 seat · turnout 26.1%
| G. Barlow | Labour | 1,553 |
| A. Foster | Conservative | 1,412 |
No. 6 (Wigan: Newtown & Rose Hill)1 seat · turnout 27.6%
| A. Peet | Labour | 1,591 |
| J. Lawson | Conservative | 801 |
No. 7 (Leigh: Hope Carr)1 seat · turnout 43.3%
| R. Goodwin | Conservative | 1,711 |
| A Robert | Labour | 1,334 |
No. 8 (Leigh: St. Pauls & St. Peters)1 seat · turnout 27.1%
| G. Macdonald | Labour | 1,542 |
| W. Lackenby | Conservative | 830 |
| H. Kedward | COMM | 90 |
No. 9 (Leigh: Etherstone & St. Marys)1 seat · turnout 33.0%
| P. Smith | Labour | 1,386 ✓ |
| H. Davies | Conservative | 1,385 |
| E. Moore | Ind Lab | 146 |
| K. James | COMM | 57 |
