POPULATION: 487,011

INCORPORATION DATE: 1850

BOARD OF SUPERVISORS:

• District 1 – Susan Gorin
• District 2 – David Rabbitt
• District 3 – Shirlee Zane
• District 4 – Mike McGuire
• District 5 – Efren Carrillo

FORM OF GOVERNMENT: General Law

SONOMA. County seat, Santa Rosa. Created February 18, 1850. Sonoma is a Chocuyen Indian name translated by some as “Valley of the Moon” and by others as “land or tribe of the Chief Nose.”