94503
ZIP 94503 is American Canyon, California, mostly in Napa County; area codes 707 and 369; Pacific time.
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Where 94503 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 94503 into a pocket calculator and turn it upside down: EOShG — not quite a word, sorry.
- ➕ As a number, 94,503 = 3 × 17 × 17 × 109. Its digits add up to 21, a total 2,594 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10111000100100111 - 🏠 Its numerical neighbours: 94502 (Alameda, CA, 31 mi away) and 94505 (Discovery Bay, CA, 41 mi away).
- 🔄 Backwards, 94503 becomes 30549 — and that is a real ZIP code: Jefferson, GA, 2,159 miles away.
- 👥 52 other ZIP codes are made of exactly the same digits (04359, 04539, 04935, 04953, 05439, 09354, …). The farthest-flung twin is 09354 in APO AE, a military post office, 5,406 miles away.
- 🧭 Farther south than 57% of all ZIP codes, and farther west than 96%.
- 🎯1,271 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 94503 and you would come out at 38.19°S, 57.78°E — 987 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 14h 49m of daylight. Shortest: 9h 30m.
- 📏 At 27.0 square miles of land, 94503 is bigger than 43% of ZIP codes — room for about 21 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 21,841This ZIP21,841 |
|---|---|
| Households | 6,063This ZIP6,063 |
| Housing units | 6,206This ZIP6,206 |
| Median age | 37.0This ZIP37.0California37.9US 38.9 |
| Median household income | $121,088This ZIP$121,088California$99,122US $80,734 |
| Median home value | $697,400This ZIP$697,400California$734,700US $332,700 |
| Median gross rent | $2,524This ZIP$2,524California$2,036US $1,413 |
| Bachelor's degree or higher | 32.4%This ZIP32.4% |
| Mean commute | 29.7 minThis ZIP29.7 min |
| Population density | 808.4 / sq miThis ZIP808.4 / sq mi |
Business and tax activity
| Business establishments | 363This ZIP363 |
|---|---|
| Employees | 6,205This ZIP6,205 |
| Annual payroll | $349,046,000This ZIP$349,046,000 |
| Tax returns filed | 10,530This ZIP10,530 |
| Total adjusted gross income | $910,057,000This ZIP$910,057,000 |
Land area
| Land area | 27.02 sq miThis ZIP27.02 sq mi |
|---|---|
| Water area | 1.61 sq miThis ZIP1.61 sq mi |
Counties 94503 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Napa County | 66.4% |
| Solano County | 33.6% |
Other place names in 94503
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 94503
| ZIP | City | Distance |
|---|---|---|
94589 | Vallejo, CA | 3.4 mi |
94591 | Vallejo, CA | 4.4 mi |
94559 | Napa, CA | 5.9 mi |
94590 | Vallejo, CA | 6.5 mi |
94534 | Fairfield, CA | 6.8 mi |
94592 | Vallejo, CA | 7.5 mi |
94510 | Benicia, CA | 7.7 mi |
94581 | Napa, CA | 8.3 mi |
94525 | Crockett, CA | 9.7 mi |
94569 | Port Costa, CA | 10.1 mi |
Find every ZIP code within 10 miles of 94503 →
Questions about this ZIP code
Where is ZIP code 94503?
94503 is in American Canyon, California, in Napa County, part of the Napa, CA metropolitan area. Its published point location is 38.1879, -122.2236.
What county is 94503 in?
94503 spans 2 counties: Napa County and Solano County. Most of it falls in Napa County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.
What area code is 94503?
American Canyon uses area codes 707 and 369, from NANPA's telephone records.
What time zone is 94503 in?
94503 uses America/Los_Angeles.
How many people live in 94503?
About 21,841 people live in ZIP code 94503, in 6,063 households, at 808.4 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 94503?
$121,088 a year, against $99,122 across California.
What ZIP codes are near 94503?
The closest are 94589 (3.4 mi), 94591 (4.4 mi), 94559 (5.9 mi), 94590 (6.5 mi) and 94534 (6.8 mi).
Is 94503 a PO Box ZIP code?
94503 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “94503 ZIP Code — American Canyon, California (Napa County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/94503
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/94503.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.