County ZIP codes · California · FIPS 06097
Sonoma County, CA ZIP Codes
Sonoma County, California has 52 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 40 residential and 12 for PO boxes or a single organization. 38 of the residential ones lie mainly in Sonoma County and 2 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $78,906 in 95421 (Cazadero) to $139,474 in 94574 (Saint Helena) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Sonoma County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $99,280 and $118,299.
They carry 34 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 40 residential ZIP codes in Sonoma County
38 ZIP codes lie mainly in Sonoma County; 2 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 94928 | Rohnert Park | 46,829 | 6,046 | $99k | $666k | 100% |
| 95403 | Santa Rosa | 45,806 | 2,127 | $98k | $693k | 100% |
| 95407 | Santa Rosa | 42,036 | 1,945 | $83k | $627k | 100% |
| 94954 | Petaluma | 37,574 | 604 | $114k | $841k | 100% |
| 95404 | Santa Rosa | 37,011 | 491 | $105k | $904k | 100% |
| 95401 | Santa Rosa | 36,861 | 1,763 | $94k | $631k | 100% |
| 95476 | Sonoma | 35,196 | 327 | $105k | $897k | 98% |
| 95472 | Sebastopol | 28,747 | 409 | $109k | $1.02M | 100% |
| 95492 | Windsor | 27,429 | 1,386 | $134k | $810k | 100% |
| 95409 | Santa Rosa | 25,616 | 732 | $108k | $802k | 100% |
| 95405 | Santa Rosa | 22,744 | 4,534 | $118k | $788k | 100% |
| 95448 | Healdsburg | 16,077 | 87 | $105k | $1.05M | 100% |
| 95425 | Cloverdale | 10,978 | 57 | $119k | $653k | 68% |
| 94931 | Cotati | 9,487 | 1,227 | $102k | $820k | 100% |
| 94515 | Calistoga | 6,946 | 60 | $95k | $825k | 51% |
| 95436 | Forestville | 5,821 | 274 | $110k | $740k | 100% |
| 95446 | Guerneville | 4,607 | 148 | $86k | $611k | 100% |
| 95442 | Glen Ellen | 3,449 | 138 | $165k | $1.33M | 100% |
| 94951 | Penngrove | 3,294 | 256 | $106k | $1.21M | 100% |
| 95452 | Kenwood | 1,762 | 107 | $119k | $948k | 100% |
| 95441 | Geyserville | 1,648 | 10 | $127k | $1.28M | 100% |
| 95421 | Cazadero | 1,570 | 11 | $79k | $633k | 100% |
| 94923 | Bodega Bay | 1,483 | 77 | $148k | $1.19M | 100% |
| 95497 | The Sea Ranch | 1,275 | 84 | $138k | $1.38M | 100% |
| 95465 | Occidental | 1,203 | 25 | $121k | $1.08M | 100% |
| 95462 | Monte Rio | 1,058 | 293 | $86k | $681k | 100% |
| 95444 | Graton | 625 | 1,990 | $105k | $801k | 100% |
| 95439 | Fulton | 486 | 182 | – | $722k | 100% |
| 95471 | Rio Nido | 394 | 111 | – | $603k | 100% |
| 95412 | Annapolis | 331 | 4 | – | $717k | 100% |
| 95450 | Jenner | 224 | 6 | $123k | $871k | 100% |
| 95419 | Camp Meeker | 152 | 2,338 | – | $669k | 100% |
| 95431 | Eldridge | 43 | 358 | – | – | 100% |
| 95486 | Villa Grande | 17 | 895 | – | – | 100% |
| 95480 | Stewarts Point | 8 | 1 | – | – | 100% |
| 94922 | Bodega | 6 | 1 | – | – | 100% |
| 94972 | Valley Ford | no residents | 0 | – | – | 100% |
| 95430 | Duncans Mills | no residents | 0 | – | – | 100% |
Partly in Sonoma County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
5 ZIP codes of Sonoma County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Sonoma | Elsewhere |
|---|---|---|
| 95476 | 98% | Napa County 2% |
| 94952 | 49% | Marin County 52% |
| 95425 | 68% | Mendocino County 32% |
| 94574 | 1% | Napa County 99% |
| 94515 | 51% | Napa County 49% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Sonoma County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Sonoma County's ZIP codes use 3 prefixes: 945, 949 and 954.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 945 | Oakland, CA (SCF 945) | 2 | 93 |
| 949 | North Bay, CA (SCF 949) | 14 | 55 |
| 954 | North Bay, CA (SCF 949) | 36 | 77 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.