City of Durham is a constituency[n 1] represented in the House of Commons of the UK Parliament since 2019 by Mary Kelly Foy of the Labour Party.

The seat has traditionally been dominated by Labour, with support particularly strong in those villages historically connected to County Durham's mining industry.

3. c. 15) was passed to prevent any honorary freeman from voting in a borough election within twelve months of their being accorded that status.

The Lambton and Tempest families were influential, and were generally able to secure election, but fell far short of the sort of control common in pocket boroughs.

The Reform Act 1867 extended the boundaries to include part of Framwellgate parish which had previously been excluded.

[5] Under the Redistribution of Seats Act 1885, the borough's representation was reduced from the 1885 general election to a single MP.

Hetton transferred back to Houghton-le-Spring, and Spennymoor and Brancepeth now included in Durham North West.