City Solano 115,942 &10000000000000030670000 30.67 sq mi (79.4 km 2 ) 01868-03-30 March 30, 1868 Ventura City Ventura 106,433 &10000000000000021649999 21.65 sq mi (56.1 km 2 ) 01866-04-02 April 2, 1866 Vernon City Los Angeles 112 &10000000000000004969999 4.97 sq mi (12.9 km 2 ) 01905-09-22 September 22, 1905 Victorville City San Bernardino 115,903 &10000000000000073180000 73.18 sq mi (189.5 km 2 ) 01962-09-21 September