Voting is restricted to the four councils which are constituent members of the combined authority: Barnsley, Doncaster, Rotherham and Sheffield.

The leading candidate needed to achieve over 50% of the first preference votes in order to be elected in the first round.

Dan Jarvis, the Labour and Co-operative candidate, was subsequently elected in the second round with a total number of 144,154 votes.

[2] This means that the winning candidate has the support of a majority of voters who expressed a preference among the top two.

All registered electors (British, Irish, Commonwealth and European Union citizens) living in the combined authority area aged 18 or over on 3 May 2018 were entitled to vote in the mayoral election.