The 1957 Beckenham by-election was held on 21 March 1957. It was called when the incumbent Conservative MP Patrick Buchan-Hepburn was elevated to a hereditary peerage. The seat was held for the Conservatives by their candidate Philip Goodhart. Future Prime Minister Margaret Thatcher was one of the unsuccessful candidates for the Conservative nomination.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Conservative | Philip Goodhart | 29,621 | 62.94 | −6.02 | |
| Labour | Neville D. Sandelson | 17,445 | 37.06 | +6.02 | |
| Majority | 12,176 | 25.87 | −12.06 | ||
| Turnout | 47,066 | 64.70 | −11.81 | ||
| Registered electors | 72,786 | ||||
| Conservative hold | Swing | -6.0 | |||
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