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Where 95521 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 95521 into a pocket calculator and turn it upside down: IZSSG — not quite a word, sorry.
- ➕ As a number, 95,521 = 59 × 1619. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10111010100100001 - 🏠 Its numerical neighbours: 95519 (Mckinleyville, CA, 8 mi away) and 95524 (Bayside, CA, 2 mi away).
- 🔄 Backwards, 95521 becomes 12559, which is not a ZIP code at all.
- 👥 26 other ZIP codes are made of exactly the same digits (12955, 15259, 15295, 15925, 15952, 19255, …). The farthest-flung twin is 19255 in Philadelphia, PA, 2,540 miles away.
- 🧭 Farther north than 65% of all ZIP codes, and farther west than 98%.
- 🎯1,338 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 95521 and you would come out at 40.84°S, 55.95°E — 908 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 14m.
- 📏 At 60.4 square miles of land, 95521 is bigger than 65% of ZIP codes — room for about 46 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 21,980This ZIP21,980 |
|---|---|
| Households | 9,225This ZIP9,225 |
| Housing units | 10,198This ZIP10,198 |
| Median age | 29.2This ZIP29.2California37.9US 38.9 |
| Median household income | $53,114This ZIP$53,114California$99,122US $80,734 |
| Median home value | $501,000This ZIP$501,000California$734,700US $332,700 |
| Median gross rent | $1,336This ZIP$1,336California$2,036US $1,413 |
| Bachelor's degree or higher | 46.4%This ZIP46.4% |
| Mean commute | 17.9 minThis ZIP17.9 min |
| Population density | 364.1 / sq miThis ZIP364.1 / sq mi |
Business and tax activity
| Business establishments | 613This ZIP613 |
|---|---|
| Employees | 7,881This ZIP7,881 |
| Annual payroll | $352,279,000This ZIP$352,279,000 |
| Tax returns filed | 8,530This ZIP8,530 |
| Total adjusted gross income | $481,775,000This ZIP$481,775,000 |
Land area
| Land area | 60.36 sq miThis ZIP60.36 sq mi |
|---|---|
| Water area | 11.15 sq miThis ZIP11.15 sq mi |
Other place names in 95521
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 95521
| ZIP | City | Distance |
|---|---|---|
95524 | Bayside, CA | 1.6 mi |
95518 | Arcata, CA | 2.7 mi |
95501 | Eureka, CA | 5.9 mi |
95502 | Eureka, CA | 7.5 mi |
95534 | Cutten, CA | 7.5 mi |
95503 | Eureka, CA | 8.0 mi |
95519 | Mckinleyville, CA | 8.3 mi |
95564 | Samoa, CA | 9.1 mi |
95550 | Korbel, CA | 11.8 mi |
95537 | Fields Landing, CA | 12.1 mi |
Find every ZIP code within 10 miles of 95521 →
Questions about this ZIP code
Where is ZIP code 95521?
95521 is in Arcata, California, in Humboldt County, part of the Eureka-Arcata, CA micropolitan area. Its published point location is 40.8434, -124.0453.
What county is 95521 in?
95521 lies in Humboldt County.
What area code is 95521?
Arcata uses area codes 707 and 369, from NANPA's telephone records.
What time zone is 95521 in?
95521 uses America/Los_Angeles.
How many people live in 95521?
About 21,980 people live in ZIP code 95521, in 9,225 households, at 364.1 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 95521?
$53,114 a year, against $99,122 across California.
What ZIP codes are near 95521?
The closest are 95524 (1.6 mi), 95518 (2.7 mi), 95501 (5.9 mi), 95502 (7.5 mi) and 95534 (7.5 mi).
Is 95521 a PO Box ZIP code?
95521 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “95521 ZIP Code — Arcata, California (Humboldt County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/95521
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/95521.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.