"Clarkston is a city in Asotin County in the southeastern part of the State of Washington. It is part of the Lewiston ID-WA Metropolitan Statistical Area. The population was 7,229 in 2010 census.Walla Walla Community College opened a Branch Campus in Clarkston that serves the surrounding area, Lewiston, Idaho. It is still a major draw for the surrounding area.With a ZIP code of 99403, Clarkston has the highest zip code of any area in the contiguous United States."@en . "207199.0"^^ . . . . "5.41308e+06"^^ . . "246.0"^^ . . "245.974"^^ . "-7" . . "7229"^^ . "5.21e+06"^^ . "-8" . "5.20588e+06"^^ . . "99403" . "1388.6"^^ . "Clarkston, Washington"@en . "210000.0"^^ . "5.41e+06"^^ . "509" . . "1388.62"^^ .