Steven Paul Westly is an American venture capitalist, entrepreneur, educator, and politician. He was the State Controller of California from 2003 to 2007 and was one of the top candidates in the Democratic primary for Governor of California in the 2006 election. He was defeated in the Democratic primary by California State Treasurer Phil Angelides, who later lost to Republican Governor Arnold Schwarzenegger in the November 2006 elections.

The state controller of California is a constitutional office in the executive branch of the government of the U.S. state of California. Thirty-three individuals have held the office of state controller since statehood. The incumbent is Malia Cohen, a Democrat. The state controller's main office is located at 300 Capitol Mall in Sacramento.