Mayor of Derry City and Strabane

The Mayor of Derry City and Strabane District Council is an honorary position bestowed upon a Citizen of Derry City & Strabane District in Northern Ireland, who is in practice a member of Derry and Strabane District Council, chosen by their peers on the council to serve a one-year term. The mayor is the chairperson of the council as well as the city's first citizen. The current mayor is Lilian Seenoi-Barr of the SDLP.

The district was created in 2015 by the merger of two existing councils. The previous post of Mayor of Derry, more formally Lord Mayor of Londonderry, has a long history. A provost, Sir Henry Docwra, was appointed in the initial city charter of 1604 by James I. In 1613, this post was replaced with that of governor, or mayor, with John Rowley being the first to serve. The City charter of 1665 which provided:

And further we will, and by these presents for us our heirs and successors do grant and ordain, that for ever hereafter there be and shall be within the city of Londonderry aforesaid one of the more honest and discreet citizens of the said city, or of the more honest and discreet inhabitants within the liberty of the same, in form hereafter in these presents mentioned, from time to time to be elected, who shall be and called the mayor of the said city.

During much of its history, it has been held by unionists (largely due to the practice of gerrymandering), but in recent years, the majority of mayors have been Irish nationalists, reflecting the majority of the city's population.

From 1921 until 1969, the Lord Mayor was automatically entitled to a seat in the Senate of Northern Ireland.