| Election Name: | 1978 Welwyn Hatfield District Council election |
| Country: | Hertfordshire |
| Type: | parliamentary |
| Previous Election: | 1976 Welwyn Hatfield District Council election |
| Previous Year: | 1976 |
| Next Election: | 1979 Welwyn Hatfield District Council election |
| Next Year: | 1979 |
| Seats For Election: | 16 out of 43 seats to Welwyn Hatfield District Council |
| Majority Seats: | 23 |
| Turnout: | ~36,191, 54.7% |
| Party1: | Conservative Party (UK) |
| Last Election1: | 24 seats, 55.2% |
| Seats Before1: | 24 |
| Seats After1: | 23 |
| Seat Change1: | 1 |
| Popular Vote1: | 20,742 |
| Percentage1: | 50.2% |
| Swing1: | 5.0 |
| Party2: | Labour Party (UK) |
| Last Election2: | 19 seats, 38.6% |
| Seats Before2: | 19 |
| Seats After2: | 20 |
| Seat Change2: | 1 |
| Popular Vote2: | 19,128 |
| Percentage2: | 46.9% |
| Swing2: | 8.3 |
| Party3: | Liberal Party (UK) |
| Last Election3: | 0 seats, 5.4% |
| Seats Before3: | 0 |
| Seats After3: | 0 |
| Popular Vote3: | 1,164 |
| Percentage3: | 2.9% |
| Swing3: | 3.2 |
| Map Size: | 270px |
The 1978 Welwyn Hatfield District Council election took place on 4 May 1978 to elect members of Welwyn Hatfield District Council in England.[1] This was on the same day as other local elections. A third of the total seats were up for election, one for each ward plus an additional seat in the wards for Hatfield East and Peartree. While the Labour party made notable gains in the popular vote at the cost of the Conservative and Liberal parties, they only took one seat from the Conservatives. This meant the Conservatives kept their majority control of the council, albeit only just.