what county is vacaville ca in
Vacaville, CA. Vacaville is located in northwest California. Vacaville is part of Solano County. Vacaville has 28.37 square miles of land area and 0.21 square miles of water area. As of 2010-2014, the total Vacaville population is 93,994, which has grown 6.06% since 2000.