Cotati is a city in Sonoma County, California, United States. Cotati's hexagonal downtown plaza is listed as a California Historical Landmark, one of only two hexagonal town layouts in the United States. The population was 6,471 at the 2000 census. Citizens of Cotati are called 'Cotatians'. Cotati apartments for rent comparison page shows most up to date rent information on Cotati apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.