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Where 99121 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 99121 into a pocket calculator and turn it upside down: IZIGG — not quite a word, sorry.
- ➕ As a number, 99,121 = 11 × 9011. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
11000001100110001 - 🏠 Its numerical neighbours: 99119 (Cusick, WA, 60 mi away) and 99122 (Davenport, WA, 87 mi away).
- 🔄 Backwards, 99121 becomes 12199, which is not a ZIP code at all.
- 👥 11 other ZIP codes are made of exactly the same digits (12919, 19129, 19192, 21919, 29911, 91129, …). The farthest-flung twin is 29911 in Brunson, SC, 2,209 miles away.
- 🧭 Farther north than 98% of all ZIP codes, and farther west than 92%.
- 🎯1,161 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 99121 and you would come out at 48.94°S, 61.53°E — 394 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 16h 12m of daylight. Shortest: 8h 14m.
- 📏 At 52.9 square miles of land, 99121 is bigger than 61% of ZIP codes — room for about 40 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 262This ZIP262 |
|---|---|
| Households | 91This ZIP91 |
| Housing units | 119This ZIP119 |
| Median age | 57.1This ZIP57.1Washington38.3US 38.9 |
| Median home value | $392,000This ZIP$392,000Washington$564,600US $332,700 |
| Bachelor's degree or higher | 45.1%This ZIP45.1% |
| Mean commute | 62.5 minThis ZIP62.5 min |
| Population density | 5.0 / sq miThis ZIP5.0 / sq mi |
Business and tax activity
| Business establishments | 4This ZIP4 |
|---|---|
| Employees | 13This ZIP13 |
| Annual payroll | $690,000This ZIP$690,000 |
Land area
| Land area | 52.87 sq miThis ZIP52.87 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
Other place names in 99121
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 99121
| ZIP | City | Distance |
|---|---|---|
99146 | Laurier, WA | 7.9 mi |
99118 | Curlew, WA | 8.1 mi |
99160 | Orient, WA | 8.9 mi |
99150 | Malo, WA | 11.0 mi |
99107 | Boyds, WA | 14.5 mi |
99141 | Kettle Falls, WA | 20.4 mi |
98859 | Wauconda, WA | 24.1 mi |
99166 | Republic, WA | 24.4 mi |
99151 | Marcus, WA | 26.4 mi |
99126 | Evans, WA | 26.7 mi |
Find every ZIP code within 10 miles of 99121 →
Questions about this ZIP code
Where is ZIP code 99121?
99121 is in Danville, Washington, in Ferry County. Its published point location is 48.9362, -118.4692.
What county is 99121 in?
99121 lies in Ferry County.
What area code is 99121?
Danville uses area code 509, from NANPA's telephone records.
What time zone is 99121 in?
99121 uses America/Los_Angeles.
How many people live in 99121?
About 262 people live in ZIP code 99121, in 91 households, at 5.0 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 99121?
The closest are 99146 (7.9 mi), 99118 (8.1 mi), 99160 (8.9 mi), 99150 (11 mi) and 99107 (14.5 mi).
Is 99121 a PO Box ZIP code?
99121 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “99121 ZIP Code — Danville, Washington (Ferry County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99121
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/99121.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.