COUNTY · CA

Riverside County, California

Riverside County is a county in California with FIPS code 06065 and an estimated population of 2,492,442 (Census 2023), 4th largest of 58 in the state.

County facts

Name: Riverside County
State: California
Type: county
FIPS code: 06065
State FIPS: 06
Population (2023): 2,492,442
Change since 2020: +2.9%
State rank: 4 of 58

Population is the Census Bureau’s Vintage 2023 estimate.

Major cities in Riverside County

Palm Springs Riverside

Other counties in California

Los Angeles County San Diego County Orange County San Bernardino County Santa Clara County Alameda County Sacramento County Contra Costa County All 58

Questions

What is the FIPS code for Riverside County?

Riverside County, California has the five-digit FIPS code 06065: 06 for the state and 065 for the county.

What state is Riverside County in?

Riverside County is in California.

How do I know if an address is in this county?

Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.

Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.