Elections to Portsmouth City Council took place on Thursday 2 May 2019, alongside other local elections across the country. The seats contested in this election were last contested in 2015. The Conservative Party had 8 seats they were defending, the Liberal Democrats 5 and Labour 1 seat. A by-election occurred within the vacant Cosham seat from last years election, due to the sitting Conservative standing down. No party gained a majority from this election, and therefore the council remains under no overall control.

The 2019 United Kingdom local elections took place on Thursday 2 May 2019, with 248 English local councils, six directly elected mayors in England, and all 11 local councils in Northern Ireland being contested.