Dee Why is within the Northern Beaches Council local government area, and is home to the Warringah Civic Centre built in 1973, which contains the Council Chambers and is situated just to the north of the Sulman Award-winning Library, completed in 1966. Formerly split between the A and B Wards of Warringah Council, the suburb is now entirely within the Curl Curl Ward of Northern Beaches Council, returning three councillors. Dee Why is in both the federal electorates of Warringah, represented by the independent member of parliament Zali Steggall, and the electorate of Mackellar, which is currently represented by Jason Falinski, a former Warringah councillor of the Liberal Party. The suburb lies within both the state electorates of Wakehurst and Manly, who are represented by the Liberal Party members Brad Hazzard, the Health Minister, and James Griffin, a former Manly Deputy Mayor, respectively.