Kuala Kubu Baharu is a state constituency in Selangor, Malaysia, that has been represented in the Selangor State Legislative Assembly since 1974. The state constituency was created in the 1974 redistribution and is mandated to return a single member to the Selangor State Legislative Assembly under the first past the post voting system. Since 2013, the State Assemblyman for Kuala Kubu Baharu is Lee Kee Hiong from the Democratic Action Party (DAP), which is part of the state's ruling coalition, Pakatan Harapan (PH).