UK Polling History: Election of 31 March 1966 – Portsmouth West
Result summary
| Parties | ||
| Labour | Conservative | |
| Votes | 18,685 | 17,458 |
| Votes gained | +420 | -1,304 |
| Share of votes | 51.7% | 48.3% |
| Share of eligible voters | 39.5% | 37.0% |
| Gain in share of votes | +2.4% | -2.4% |
| Gain in share of eligible voters | +2.7% | -0.9% |
| Total votes: | 36,143 | |
| Electorate: | 47,247 | |
| Turnout: | 76.5% | |
| Outcome: | Labour gain from Conservative | |
| Swing: | 2.4% | Labour from Conservative |
Polling history
List of contests
| Date | Type | Parties | |||
| Conservative | Labour | Other | Communist | ||
| Date | Type | Parties | |||
| Conservative | Labour | Other | Communist | ||
| 18 June 1970 | General Election | 16,214 | 17,169 | 579 | |
| 31 March 1966 | General Election | 17,458 | 18,685 | ||
| 15 October 1964 | General Election | 18,762 | 18,265 | ||
| 8 October 1959 | General Election | 23,600 | 17,334 | ||
| 26 May 1955 | General Election | 23,729 | 20,060 | ||
| 25 October 1951 | General Election | 25,363 | 24,115 | ||
| 23 February 1950 | General Election | 24,924 | 23,979 | 257 | |