| Election Name: | 1984 Welwyn Hatfield District Council election |
| Country: | Hertfordshire |
| Type: | parliamentary |
| Previous Election: | 1983 Welwyn Hatfield District Council election |
| Previous Year: | 1983 |
| Next Election: | 1986 Welwyn Hatfield District Council election |
| Next Year: | 1986 |
| Seats For Election: | 14 out of 43 seats to Welwyn Hatfield District Council |
| Majority Seats: | 22 |
| Turnout: | 32,912, 47.9% |
| Party1: | Labour Party (UK) |
| Last Election1: | 24 seats, 36.2% |
| Seats Before1: | 24 |
| Seats After1: | 24 |
| Popular Vote1: | 14,103 |
| Percentage1: | 42.9% |
| Swing1: | 6.7 |
| Party2: | Conservative Party (UK) |
| Last Election2: | 19 seats, 47.3% |
| Seats Before2: | 19 |
| Seats After2: | 19 |
| Popular Vote2: | 12,579 |
| Percentage2: | 38.2% |
| Swing2: | 9.1 |
| Party3: | SDP-Liberal Alliance |
| Last Election3: | 0 seats, 16.4% |
| Seats Before3: | 0 |
| Seats After3: | 0 |
| Popular Vote3: | 6,230 |
| Percentage3: | 18.9% |
| Swing3: | 2.5 |
| Map Size: | 270px |
The 1984 Welwyn Hatfield District Council election took place on 3 May 1984 to elect members of Welwyn Hatfield District Council in England.[1] This was on the same day as other local elections. While the local elections across the country saw each party's share of the popular barely change Welwyn Hatfield was an exception to this, seeing the Conservatives lose nearly a tenth of the popular vote share. However, this did not translate into any seats changing hands for any party.