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Where 37321 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 37321 into a pocket calculator and turn it upside down: IZELE — not quite a word, sorry.
- ➕ 37321 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 16, a total 1,922 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1001000111001001 - 🏠 Its numerical neighbours: 37320 (Cleveland, TN, 24 mi away) and 37322 (Decatur, TN, 10 mi away).
- 🔄 Backwards, 37321 becomes 12373, which is not a ZIP code at all.
- 👥 28 other ZIP codes are made of exactly the same digits (12733, 13327, 13732, 17233, 17323, 17332, …). The farthest-flung twin is 13327 in Croghan, NY, 780 miles away.
- 🧭 Farther south than 71% of all ZIP codes, and farther east than 57%.
- 🎯799 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 37321 and you would come out at 35.50°S, 94.99°E — 1,222 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 34m of daylight. Shortest: 9h 45m.
- 📏 At 114.0 square miles of land, 37321 is bigger than 81% of ZIP codes — room for about 87 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 21,084This ZIP21,084 |
|---|---|
| Households | 8,321This ZIP8,321 |
| Housing units | 9,274This ZIP9,274 |
| Median age | 40.2This ZIP40.2Tennessee38.9US 38.9 |
| Median household income | $54,684This ZIP$54,684Tennessee$69,595US $80,734 |
| Median home value | $192,700This ZIP$192,700Tennessee$286,700US $332,700 |
| Median gross rent | $857This ZIP$857Tennessee$1,189US $1,413 |
| Bachelor's degree or higher | 19.3%This ZIP19.3% |
| Mean commute | 27.4 minThis ZIP27.4 min |
| Population density | 184.9 / sq miThis ZIP184.9 / sq mi |
Business and tax activity
| Business establishments | 396This ZIP396 |
|---|---|
| Employees | 8,089This ZIP8,089 |
| Annual payroll | $323,457,000This ZIP$323,457,000 |
| Tax returns filed | 8,330This ZIP8,330 |
| Total adjusted gross income | $511,375,000This ZIP$511,375,000 |
Land area
| Land area | 114.01 sq miThis ZIP114.01 sq mi |
|---|---|
| Water area | 5.94 sq miThis ZIP5.94 sq mi |
Counties 37321 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Rhea County | 95.1% |
| Bledsoe County | 4.9% |
Other place names in 37321
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 37321
| ZIP | City | Distance |
|---|---|---|
37332 | Evensville, TN | 7.6 mi |
37373 | Sale Creek, TN | 8.1 mi |
37322 | Decatur, TN | 10.3 mi |
37308 | Birchwood, TN | 11.0 mi |
37338 | Graysville, TN | 12.4 mi |
37304 | Bakewell, TN | 13.1 mi |
37336 | Georgetown, TN | 14.0 mi |
37367 | Pikeville, TN | 14.7 mi |
37381 | Spring City, TN | 14.7 mi |
37379 | Soddy Daisy, TN | 18.3 mi |
Find every ZIP code within 10 miles of 37321 →
Questions about this ZIP code
Where is ZIP code 37321?
37321 is in Dayton, Tennessee, in Rhea County. Its published point location is 35.5021, -85.0080.
What county is 37321 in?
37321 spans 2 counties: Rhea County and Bledsoe County. Most of it falls in Rhea 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 37321?
Dayton uses area code 423, from NANPA's telephone records.
What time zone is 37321 in?
37321 uses America/New_York.
How many people live in 37321?
About 21,084 people live in ZIP code 37321, in 8,321 households, at 184.9 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 37321?
$54,684 a year, against $69,595 across Tennessee.
What ZIP codes are near 37321?
The closest are 37332 (7.6 mi), 37373 (8.1 mi), 37322 (10.3 mi), 37308 (11 mi) and 37338 (12.4 mi).
Is 37321 a PO Box ZIP code?
37321 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “37321 ZIP Code — Dayton, Tennessee (Rhea County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/37321
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/37321.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.