ZIP code · Knightsen · California · United States
ZIP code 94548 — Knightsen
ZIP code 94548 serves Knightsen, California.
- Postal code
- 94548Single source Value from one source, not cross-checked.
- City
- Knightsen
- County
- Contra Costa FIPS 06013
- State
- California
- Country
- United States
- Coordinates
- 37.9726, -121.6652 — precision precise (locality)
View on OpenStreetMap - Population
- 637 (ZCTA, ACS 5-year)
- Population density
- 276 / sq mi
- Land area
- 2.3 sq mi (6 km²) (ZCTA, ACS 5-year)
- Median household income
- $183,100
- Per-capita income
- $57,297
- Median age
- 29.6
- Households
- 196
- Housing units
- 196
- Median home value
- $918,100
- Congressional district
- CA-10 (119th Congress)
- USDA hardiness zone
- 9b (25 to 30 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 925 (from the nearest rate centre)Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 94548 with another ZIP · ZIPs within 25 miles · distance from 94548
Map of ZIP code 94548
Climate — monthly normals
Warmest month Jul (avg high 91°F), coldest Jan (avg low 40°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 56 | 61 | 67 | 72 | 79 | 86 | 91 | 90 | 87 | 78 | 65 | 56 |
| Avg low °F | 40 | 44 | 47 | 50 | 54 | 59 | 61 | 60 | 59 | 54 | 46 | 40 |
| Precip in | 2.7 | 2.4 | 1.9 | 0.9 | 0.4 | 0.1 | 0.0 | 0.0 | 0.1 | 0.4 | 1.2 | 2.5 |
NOAA 1991–2020 climate normals from the nearest station: ANTIOCH PUMPING PLT #3 (4.8 mi) · NOAA NCEI
Places in ZIP 94548
- 1 post offices
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page