City of PleasantonCityPleasanton sign on Main StreetSealMotto(s): The City of Planned ProgressLocation of Pleasanton within Alameda County, California.City of PleasantonLocation in the United StatesCoordinates: 37°39′45″N 121°52′29″WCountryUnited StatesStateCaliforniaCountyAlamedaIncorporatedJune 18, 1894[1]Government • TypeCouncil–manager • MayorJerry Thorne[2] • State SenateSteve Glazer (D)[3] • State AssemblyCatharine Baker (R)[4] • U.S. CongressEric Swalwell (D)[5]Area[6] • Total24.28 sq mi (62.88 km2) • Land24.13 sq mi (62.49 km2) • Water0.15 sq mi (0.39 km2) 0.63%Elevation[7]351 ft (107 m)Population (2010) • Total70,285 • Estimate (2016)[8]82,270 • Density3,409.87/sq mi (1,316.55/km2)Time zonePST (UTC-8) • Summer (DST)PDT (UTC-7)ZIP codes94566, 94568, 94588Area code(s)925FIPS code06-57792GNIS feature IDs277578, 2411441Websitewww.cityofpleasantonca.gov