David Sen-Fu Chiu (Chinese: 邱信福, born April 2, 1970) is an American politician currently serving as the City Attorney of San Francisco. Previously, he served in the California State Assembly as a Democrat representing the 17th Assembly District, which encompasses the eastern half of San Francisco. Prior to being elected to the Assembly in 2014, Chiu was the President of the San Francisco Board of Supervisors and Supervisor for District 3, encompassing the northeastern corner of the city, including Chinatown, Nob Hill, North Beach, Union Square, the Financial District, and Fisherman's Wharf.