Eldridge, CA

ZIP code 95431 serves Eldridge, an unincorporated community in Sonoma County near the northern end of Sonoma Valley. The area is largely rural, with vineyards and foothills nearby. Its most prominent landmark is the historic Sonoma Developmental Center campus, formerly the Sonoma State Home, whose extensive grounds and institutional buildings are a defining feature of Eldridge. Glen Ellen and Jack London State Historic Park are nearby.