Placer County, CA ZIP Codes & Directory
Complete postal guide for Placer County, California. Featuring the official county seat of Auburn, largest municipality Roseville, and serving 14 incorporated municipal entities.
Municipalities Located in Placer County
Incorporated Cities, Towns, and Villages
Applegate
cityZIPs: 95703
Auburn
cityZIPs: 95602, 95603
Colfax
cityZIPs: 95713
Foresthill
cityZIPs: 95631
Granite Bay
cityZIPs: 95746
Lincoln
cityZIPs: 95648
Loomis
cityZIPs: 95650
Meadow Vista
cityZIPs: 95722
Newcastle
cityZIPs: 95658
Olympic Valley
cityZIPs: 96146
Penryn
cityZIPs: 95663
Rocklin
cityZIPs: 95677, 95765
Roseville
cityZIPs: 95661, 95678 , +1 more
Sheridan
cityZIPs: 95681
Active USPS ZIP Codes in Placer County
Standard delivery zones and geographic service boundaries
Frequently Asked Questions About Placer County, CA
What is the county seat and largest city in Placer County? ▾
The official county seat of Placer County is Auburn, and its largest incorporated municipality by population is Roseville.
How many cities, towns, and villages are in Placer County? ▾
Placer County encompasses 14 incorporated municipal entities, including 14 cities, 0 towns, and 0 villages.
What is the total population and land area of Placer County? ▾
According to official U.S. Census Bureau data, Placer County has a population of approximately 404,739 residents and spans an area of 1,407 square miles.
How many ZIP codes operate in Placer County? ▾
There are 18 active USPS ZIP codes serving addresses within Placer County, California.