County ZIP codes · California · FIPS 06095
Solano County, CA ZIP Codes
Solano County, California has 22 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 21 residential and 1 for PO boxes or a single organization. 15 of the residential ones lie mainly in Solano County and 6 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $65,290 in 94590 (Vallejo) to $140,198 in 94534 (Fairfield) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Solano 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 $87,740 and $115,591.
They carry 15 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 21 residential ZIP codes in Solano County
15 ZIP codes lie mainly in Solano County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 94533 | Fairfield | 78,805 | 3,498 | $87k | $542k | 100% |
| 95687 | Vacaville | 69,390 | 1,557 | $110k | $606k | 100% |
| 94591 | Vallejo | 58,193 | 2,758 | $105k | $631k | 97% |
| 94534 | Fairfield | 41,203 | 532 | $140k | $745k | 100% |
| 95688 | Vacaville | 40,201 | 437 | $118k | $687k | 100% |
| 94590 | Vallejo | 37,128 | 5,657 | $65k | $531k | 100% |
| 94589 | Vallejo | 29,990 | 5,294 | $93k | $540k | 100% |
| 94585 | Suisun City | 29,357 | 276 | $95k | $581k | 100% |
| 94510 | Benicia | 26,749 | 917 | $121k | $810k | 100% |
| 95620 | Dixon | 22,223 | 92 | $103k | $620k | 76% |
| 94571 | Rio Vista | 10,974 | 101 | $88k | $490k | 82% |
| 94535 | Travis Afb | 3,952 | 412 | $84k | – | 100% |
| 94592 | Vallejo | 1,049 | 131 | $116k | $772k | 100% |
| 95625 | Elmira | 319 | 346 | $86k | – | 100% |
| 94512 | Birds Landing | 130 | 6 | – | – | 100% |
Partly in Solano County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 95690 | Walnut Grove | 2,431 | 47 | $90k | $682k | 36% |
| 94503 | American Canyon | 21,841 | 808 | $121k | $697k | 34% |
| 95618 | Davis | 26,267 | 818 | $116k | $867k | 23% |
| 95694 | Winters | 10,759 | 81 | $110k | $658k | 20% |
| 95612 | Clarksburg | 1,865 | 29 | $104k | $1.02M | 11% |
| 95616 | Davis | 53,630 | 1,796 | $74k | $896k | 3% |
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?
9 ZIP codes of Solano County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Solano | Elsewhere |
|---|---|---|
| 94591 | 97% | Napa County 3% |
| 95616 | 3% | Yolo County 97% |
| 95618 | 23% | Yolo County 77% |
| 95620 | 76% | Yolo County 24% |
| 94503 | 34% | Napa County 66% |
| 94571 | 82% | Sacramento County 18% |
| 95694 | 20% | Yolo County 80% |
| 95690 | 36% | Sacramento County 64% |
| 95612 | 11% | Yolo County 89% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 95696 | Vacaville |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Solano County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Solano County's ZIP codes use 2 prefixes: 945 and 956.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.