The 1978 Welwyn Hatfield District Council election took place on 4 May 1978 to elect members of Welwyn Hatfield District Council in England.

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.

This Elections in England related article is a stub.