Eldridge is a census-designated place in Sonoma County, California, United States. The population was 1,534 at the 2000 census. It is notably the home to the Sonoma Developmental Center, the largest facility serving the needs of persons with developmental disabilities in the state. Eldridge apartments for rent comparison page shows most up to date rent information on Eldridge apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.