Brianne Nadeau is an American Democratic politician in Washington, D.C., and a member of the Council of the District of Columbia representing Ward 1 since 2015. She defeated long-time incumbent Jim Graham in the Democratic Party primary and won the general election with 75% of the vote in 2014. She is the first woman to represent Ward 1 on the council and the first D.C. Councilmember to give birth while serving in office.

The Council of the District of Columbia is the legislative branch of the government of the District of Columbia. As permitted in the United States Constitution, the district is not part of any U.S. state and is overseen directly by the federal government.