San Francisco County, CA ZIP Codes & Directory
Complete postal guide for San Francisco County, California. Featuring the official county seat of San Francisco, largest municipality San Francisco, and serving 1 incorporated municipal entities.
Municipalities Located in San Francisco County
Incorporated Cities, Towns, and Villages
Active USPS ZIP Codes in San Francisco County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About San Francisco County, CA
What is the county seat and largest city in San Francisco County? ▾
The official county seat of San Francisco County is San Francisco, and its largest incorporated municipality by population is San Francisco.
How many cities, towns, and villages are in San Francisco County? ▾
San Francisco County encompasses 1 incorporated municipal entities, including 1 cities, 0 towns, and 0 villages.
What is the total population and land area of San Francisco County? ▾
According to official U.S. Census Bureau data, San Francisco County has a population of approximately 873,965 residents and spans an area of 47 square miles.
How many ZIP codes operate in San Francisco County? ▾
There are 32 active USPS ZIP codes serving addresses within San Francisco County, California.