Stanley George Wojcicki (/ˌvuːɪˈtʃɪtski/ VOO-ih-CHITS-kee; born Stanisław Jerzy Wójcicki, Polish: [vujˈt͡ɕit͡skʲi]; March 30, 1937) is a Polish American emeritus professor and former chair of the physics department at Stanford University in California, United States.