Sean Wallentine (born September 26, 1970) is a Republican former acting Member of the California State Board of Equalization, representing the 2nd District, holding office for three days from Friday, December 31, 2010 to Monday, January 3, 2011.

[3][4] Born in Lynwood, California, Wallentine served as a member of the United States Marine Corps Reserve from 1988 to 1994.

[1][2] In 1994, Wallentine completed his service in the Marine Corps and also graduated from UCLA, earning his Bachelor of Arts in history.

[1] Wallentine worked with Morrissey, Ashburn, Dutton, and Runner on enabling greater job creation in the private sector, reforming welfare, increasing criminal penalties (with particular emphasis on child predators), and increasing government accountability by cutting regulations and reducing bureaucracy.

[2][5][6] Consequently, Wallentine became the record-holder for the shortest tenure of a California constitutional officer, surpassing Governor Milton Latham, who held the record for 150 years.