Barbara Levy Boxer (born November 11, 1940) is the junior United States Senator (United States Senate) from California and a member of the Democratic Party (Democratic Party (United States)). Boxer was first elected to the U.S. Senate in 1992, becoming the second female Jewish U.S. senator, after Sen. Dianne FeinsteinCitation neededdate=April 2010. She was reelected in 1998 and in 2004 for a term ending in January 2011.

With the convening of the 110th Congress (110th United States Congress), Boxer became the first female chair of the Environment and Public Works Committee (U.S. Senate Committee on Environment and Public Works) and, following the resignation of Sen. Tim Johnson (Tim Johnson (U.S. Senator)) (D (Democratic Party (United States))-South Dakota) from the post, she was also chosen as chair of the Select Committee on Ethics (U.S. Senate Select Committee on Ethics). This made her the only senator to preside over two committees simultaneously. She holds the record for the most popular votes in a statewide contested election in California, having received 6,955,728 votes in her 2004 re-election over former Republican (Republican Party (United States)) Secretary of State (California Secretary of State) Bill Jones (Bill Jones (California politician)).

She currently holds the position of Chief Deputy Whip of the Democratic Majority (Party whips of the United States Senate).