| Election Name: | 1978 Barnet London Borough Council election |
| Type: | Parliamentary |
| Previous Election: | 1974 Barnet London Borough Council election |
| Previous Year: | 1974 |
| Next Election: | 1982 Barnet London Borough Council election |
| Next Year: | 1982 |
| Election Date: | 4 May 1978 |
| Seats For Election: | All 60 seats to Barnet London Borough Council |
| Majority Seats: | 31 |
| Turnout: | 43.6% |
| Party1: | Conservative Party (UK) |
| Seats1: | 49 |
| Percentage1: | 57.1% |
| Party2: | Labour Party (UK) |
| Seats2: | 10 |
| Percentage2: | 30.4% |
| Party3: | Independent (politician) |
| Seats3: | 1 |
| Map Size: | 340px |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Conservative |
| After Election: | Conservative |
The 1978 Barnet Council election took place on 4 May 1978 to elect members of Barnet London Borough Council in London, England. The whole council was up for election and the Conservative Party stayed in overall control of the council.
Since the last election in 1974, the Local Government Boundary Commission carried out their first periodic electoral review of Barnet under the Local Government Act 1972 and made a number of boundary changes.[1]
Overall turnout in the election was 43.6%.|}
The by-election was called following the death of Cllr. Ernest A. E. Asker.