The 1966 United Kingdom general election was held on Thursday 31 March 1966 to elect 630 members of the House of Commons, of which 511 constituencies were in England.
| Election Name: | 1966 United Kingdom general election in England |
| Country: | United Kingdom |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1964 United Kingdom general election in England |
| Previous Year: | 1964 |
| Outgoing Members: | List of MPs elected in the 1964 United Kingdom general election |
| Next Election: | 1970 United Kingdom general election in England |
| Next Year: | 1970 |
| Elected Members: | List of MPs elected in the 1966 United Kingdom general election |
| Seats For Election: | All 511 English seats in the House of Commons 256 seats needed for English majority |
| Elected Mps: | List of MPs elected in the 1970 United Kingdom general election |
| Election Date: | 31 March 1966 |
| Leader1: | Harold Wilson |
| Leader Since1: | 14 February 1963 |
| Party1: | Labour Party (UK) |
| Leaders Seat1: | Huyton |
| Last Election1: | 246 seats, 43.5% |
| Seats1: | 285 |
| Seat Change1: | 39 |
| Percentage1: | 48.0 |
| Swing1: | 4.5% |
| Leader2: | Edward Heath |
| Leader Since2: | 28 July 1965 |
| Party2: | Conservative Party (UK) |
| Leaders Seat2: | Bexley |
| Last Election2: | 262 seats, 44.1% |
| Seats2: | 219 |
| Seat Change2: | 43 |
| Percentage2: | 42.7% |
| Swing2: | 1.4% |
| Leader3: | Jo Grimond |
| Leader Since3: | 5 November 1956 |
| Party3: | Liberal Party (UK) |
| Leaders Seat3: | Orkney and Shetland |
| Last Election3: | 3 seats, 12.1% |
| Seats3: | 6 |
| Seat Change3: | 3 |
| Percentage3: | 9.0% |
| Swing3: | 3.1% |
The incumbent Labour Party led by Prime Minister Harold Wilson won 285 seats in England, its second-highest tally of seats at the time. On the other hand, the Conservative Party led by Edward Heath won only 216 seats, its lowest share of seats since the 1945 election. It was also only the second time that the Labour Party had won more seats than the Conservatives in England.
It was the only election between 1945 and 1997 in which the Labour Party won a majority of seats in England. Concurrently, this was the only election between 1945 and 1997 in which the Labour Party got a working majority in the House of Commons sufficient to last a full term in office. (In 1950, 1964 and October 1974, the Labour majority was 5, 4 and 3 seats respectively.)
| Party | Seats won | Net change in seats | Total votes (in millions) | Voteshare | Change in voteshare | |
|---|---|---|---|---|---|---|
| Labour | 285 | 39 | 10.89 | 48.0% | 4.5% | |
| Conservative | 219 | 43 | 9.69 | 42.7% | 1.4% | |
| Liberal | 6 | 3 | 2.04 | 9.0% | 3.1% |