Hertfordshire County Council elections

Hertfordshire County Council in England is elected every four years. Since the last boundary changes took effect in 2017 there have been 78 electoral divisions electing one councillor each.

Elections
Summary of the council composition, click on the year for full details of each election.

By-election results
By-elections are held for any vacancies that arise between elections.

2009–2013
At the preceding election there had also been candidates for the British National Party (307 votes, 8.0%) and for the Green Party (392 votes, 10.3%).

Election caused by the resignation of previous incumbent.

Election caused by the resignation of previous incumbent. Percentage change is since June 2009.

2013–2017
Caused by the death of the previous incumbent.

2017–2021
Council leader and Conservative councillor Robert Gordon CBE (Goffs Oak and Bury Green) died in October 2017. The seat was held for the Conservatives by Lesley Greensmith in the by-election on 22 February 2018.

Liberal Democrat councillor Charlotte Hogg (St Albans North) resigned from the council in March 2018. A by-election was held on 3 May, where Roma Mills from the Labour Party captured the seat from the Liberal Democrats.

2021–2025
The by-election was caused by the death of the incumbent Liberal Democrat, Paul Clark in December 2021. The Lib Dems won with an increased majority with Labour opting not to nominate a candidate.The by-election was caused by the death of the Labour incumbent, Judi Billing in November 2022. Labour won with an increased majority with the Lib Dems opting not to nominate a candidate.

This by-election was caused by the resignation of the incumbent Conservative, Annie Brewster.