Katy Tang (Chinese: 湯凱蒂; pinyin: Tāng Kǎidì) is an American politician currently serving on the San Francisco Board of Supervisors, representing District 4.Prior to her appointment to the Board of Supervisors, she served as a legislative aide to her predecessor Carmen Chu, who was appointed to become San Francisco Assessor-Recorder.On November 18, 2014, the Board of Supervisors elected Tang to be the Interim President of the Board of Supervisors until the Board selects a President after the appointment of a new Supervisor for District 3 to replace outgoing Assembly member-elect David Chiu.