99116
ZIP 99116 is Coulee Dam, Washington, mostly in Okanogan County; area code 509; Pacific time.
- Type
- Standard
- Time zone
- America/Los_Angeles
- County
- Okanogan +2 more
- Metro area
- none
- Population
- 1,786
- Coordinates
- 48.0148, -118.9358
Weather right now
Asking the National Weather Service…
Where 99116 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 99116 into a pocket calculator and turn it upside down: gIIGG — not quite a word, sorry.
- ➕ As a number, 99,116 = 2 × 2 × 71 × 349. Its digits add up to 26, a total 2,038 other ZIP codes share.
- 💾In binary, the way a computer stores it:
11000001100101100 - 🏠 Its numerical neighbours: 99115 (Coulee City, WA, 31 mi away) and 99117 (Creston, WA, 30 mi away).
- 🔄 Backwards, 99116 becomes 61199, which is not a ZIP code at all.
- 👥 9 other ZIP codes are made of exactly the same digits (11969, 19196, 19961, 61919, 91916, 96119, …). The farthest-flung twin is 96911 in Tamuning, GU, 5,815 miles away.
- 🧭 Farther north than 97% of all ZIP codes, and farther west than 92%.
- 🎯1,155 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 99116 and you would come out at 48.01°S, 61.06°E — 427 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
- ☀Longest day of the year: 16h 03m of daylight. Shortest: 8h 22m.
- 📏 At 47.2 square miles of land, 99116 is bigger than 58% of ZIP codes — room for about 36 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,786This ZIP1,786 |
|---|---|
| Households | 763This ZIP763 |
| Housing units | 864This ZIP864 |
| Median age | 39.3This ZIP39.3Washington38.3US 38.9 |
| Median household income | $65,946This ZIP$65,946Washington$98,141US $80,734 |
| Median home value | $238,900This ZIP$238,900Washington$564,600US $332,700 |
| Median gross rent | $1,055This ZIP$1,055Washington$1,760US $1,413 |
| Bachelor's degree or higher | 26.9%This ZIP26.9% |
| Mean commute | 16.1 minThis ZIP16.1 min |
| Population density | 37.8 / sq miThis ZIP37.8 / sq mi |
Business and tax activity
| Business establishments | 20This ZIP20 |
|---|---|
| Employees | 199This ZIP199 |
| Annual payroll | $7,106,000This ZIP$7,106,000 |
| Tax returns filed | 650This ZIP650 |
| Total adjusted gross income | $41,382,000This ZIP$41,382,000 |
Land area
| Land area | 47.20 sq miThis ZIP47.20 sq mi |
|---|---|
| Water area | 4.43 sq miThis ZIP4.43 sq mi |
Counties 99116 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Okanogan County | 97.8% |
| Grant County | 1.9% |
| Douglas County | 0.3% |
Other place names in 99116
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 99116
| ZIP | City | Distance |
|---|---|---|
99124 | Elmer City, WA | 1.2 mi |
99133 | Grand Coulee, WA | 9.3 mi |
99123 | Electric City, WA | 10.4 mi |
99140 | Keller, WA | 14.9 mi |
99103 | Almira, WA | 19.3 mi |
99155 | Nespelem, WA | 20.8 mi |
99185 | Wilbur, WA | 22.4 mi |
99147 | Lincoln, WA | 24.4 mi |
99135 | Hartline, WA | 25.5 mi |
98830 | Mansfield, WA | 29.2 mi |
Find every ZIP code within 10 miles of 99116 →
Questions about this ZIP code
Where is ZIP code 99116?
99116 is in Coulee Dam, Washington, in Okanogan County. Its published point location is 48.0148, -118.9358.
What county is 99116 in?
99116 spans 3 counties: Okanogan County, Grant County and Douglas County. Most of it falls in Okanogan 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 99116?
Coulee Dam uses area code 509, from NANPA's telephone records.
What time zone is 99116 in?
99116 uses America/Los_Angeles.
How many people live in 99116?
About 1,786 people live in ZIP code 99116, in 763 households, at 37.8 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 99116?
$65,946 a year, against $98,141 across Washington.
What ZIP codes are near 99116?
The closest are 99124 (1.2 mi), 99133 (9.3 mi), 99123 (10.4 mi), 99140 (14.9 mi) and 99103 (19.3 mi).
Is 99116 a PO Box ZIP code?
99116 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “99116 ZIP Code — Coulee Dam, Washington (Okanogan County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99116
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/99116.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.