Santa Rosa-Petaluma, CA Metro Area
The Santa Rosa-Petaluma, CA metro area is one county in California: Sonoma County. About 486,444 people lived there on July 1, 2025 (Census estimate), 0.5% fewer than in April 2020.
- Population, July 2025
- 486,444 0.5% fewer than in April 2020
- Type
- Metropolitan statistical area
- County
- Sonoma County
- Land area
- 1,575 sq mi (4,080 km²)
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- State
- California
- CBSA code
- 42220
The county in the Santa Rosa-Petaluma, CA metro area
| County | Role | Population, July 2025 |
|---|---|---|
| Sonoma County | Central | 486,444 |
A central county holds the area’s core, an urban area of at least 50,000 people. This area has no outlying counties: no neighboring county sends enough commuters to join it. A county belongs to one metro or micro area at most, and it counts whole, countryside included.
Principal cities, largest first
- Santa Rosa177,090 people
- Petaluma59,247 people
OMB names the area after its largest principal cities. A principal city is the area’s largest city, plus any other city that is very large or a big job center, and smaller ones with at least as many jobs as working residents (2020 Census and commuting figures). People counts are American Community Survey 2020–2024 5-year estimates.
Bordering metro and micro areas, nearest first
Areas with a county on this area’s edge. Distances are straight lines between the areas’ largest cities.
- Napa, CA Metro Area24 mi southeast
- Vallejo, CA Metro Area34 mi southeast
- Clearlake, CA Micro Area36 mi north
- San Francisco-Oakland-Fremont, CA Metro Area53 mi south
- Ukiah, CA Micro Area55 mi northwest
Before using this answer on a form
A metro or micro area is a statistical area that OMB draws for federal statistics. It is not a city, a local government or a mailing address, and it is not a measure of urban and rural: whole counties count, rural parts included. Programs that use metro areas, such as housing income limits or wage rates, can use their own version of these lists; check the program’s own list for an address.
Find the metro area where you are now, find your county, or see every metro and micro area by population.