POPULATION: 440,224

INCORPORATION DATE: 1850

BOARD OF SUPERVISORS: 

• District 1 – Erin Hannigan
• District 2 – Monica Brown
• District 3 – Wanda Williams
• District 4 – John Vasquez 
• District 5 – Mitch Mashburn

 *Denotes Chair of the Board

FORM OF GOVERNMENT: General Law

SOLANO. County seat, Fairfield. Created February 18, 1850. The county derives its name indirectly from that of the Franciscan missionary, Father Francisco Solano, whose name was given in baptism to the chief of one of the Indian tribes of the region. Before receiving the name Solano, the chief was called Sem-yeto, which signifies “brave or fierce hand.” At the request of General Mariano Vallejo, the county was named for Chief Solano, who at one time ruled over most of the land and tribes between the Petaluma Creek and the Sacramento River.