Selwyn District Council is the territorial authority for the Selwyn District of New Zealand. The council was formed in 1989. A Selwyn County Council previously operated in the area between 1876 and 1910.
The council is led by the mayor of Selwyn, who is currently . There are also ten ward councillors.
Councillors are elected once every three years, using the first-past-the post system. The last election to take place was in October 2025.
In 2020, the council had 282 staff, including 41 earning more than $100,000. According to the right-wing Taxpayers' Union think tank, residential rates averaged $2,488.