1963 Deptford by-election
# 1963 Deptford by-election

The 1963 Deptford by-election was held on 4 July 1963 following the death of the incumbent Labour MP Sir Leslie Plummer on 15 April. The seat was comfortably retained by the future Cabinet Member John Silkin.

Deptford by-election, 1963 :

| Party | Party | Candidate | Votes | % | ±% |
| - | - | - | - | - | - |
| | Labour | John Silkin | 12,209 | 58.25 | -3.70 |
| | Liberal | David John Howard Penwarden | 4,726 | 22.55 | n/a |
| | Conservative | John D Brimacombe | 4,023 | 19.20 | -18.85 |
| Majority | Majority | Majority | 7,483 | 35.70 | +11.80 |
| Turnout | Turnout | Turnout | 20,958 | | |
| | Labour hold | Labour hold | Swing | | |
