Elections to Welwyn Hatfield Borough Council took place on 3 May 2018.

This was on the same day as other local elections across the United Kingdom.

[1] The Conservatives saw a reduction a large reduction in their number of seats, only just hanging on to majority of the council.

[2] Prior to the election the composition of the council was: After the election, the composition of the council was: [4] A by-election was held on 29 November following the death of Mandy Perkins, the leader of the Council.