Residential delivery area · Tennessee
ZIP Code 37321: Dayton, TN
ZIP code 37321 uses the postal name Dayton, Tennessee and lies mostly in Rhea County (95% of its land) with the rest in Bledsoe County (Census 2020 ZIP-county file). About 21,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $54,684 (Census Bureau, ACS 2020-2024). By Census place, 7% of its land lies in Dayton; 93% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Dayton · its only residential ZIP
- County
- Rhea County (95%); Bledsoe County (5%)
- Census places
- Dayton
- House district
- TN-4 119th Congress
- State
- Tennessee
- Time zone
- Eastern
- Land area
- 114.0 sq mi · 185 people per sq mi
Where is ZIP code 37321?
37321 centers on 35.502°, -85.008° and covers 114.0 square miles of land plus 5.9 of water. It borders 6 ZIP codes: 37332, 37373, 37322, 37308, 37338, 37367.
The map draws ZIP code areas only. For the streets inside 37321, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 37321 compare with the rest of Rhea County?
| Measure | 37321 | In Rhea County | In TN |
|---|---|---|---|
| People (ACS 2020-2024) | 21,084 | 1st of 5 | 119th of 636 |
| Median household income | $55k | 2nd of 3 | 303rd of 425 |
| Median home value | $193k | 2nd of 2 | 292nd of 436 |
Its median household income is higher than in 21% of U.S. residential ZIP codes, and it is denser than 62% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 37321?
The 2020 Census counted 19,823 people in 37321; the ACS, which samples households over 2020-2024, estimates 21,084. Between the 2010 and 2020 censuses its population grew 3.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 21,084
- 2020 Census count
- 19,823+3.7% since 2010 (19,113)
- Households
- 8,321
- Median age
- 40.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 37321?
Of the 21,084 people the ACS estimates in 37321, 21.9% are under 18 and 17.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.6%).
- Under 1821.9%
- 18 to 6460.5%
- 65 and older17.6%
- White, not Hispanic84.6%
- Hispanic or Latino8.0%
- Other or two or more5.4%
- Black, not Hispanic1.3%
- Asian, not Hispanic0.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 37321 earn?
Median household income is $54,684 (ACS 2020-2024), the 2nd highest of the 3 ranked ZIP codes in Rhea County. It is not measurably different from 2015-2019 ($50,240 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $54,684
- Income per person
- $30,389
- Below the poverty line
- 14.9%
- Unemployed (of the labor force)
- 6.1%
- Adults 25+ with a bachelor's degree
- 19.3%
- Adjusted gross income per tax return, 2022
- $61,3908,330 returns; wages 70% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 37321?
FHFA's house price index for 37321, built from repeat sales and appraisals of the same homes, rose 131% from 2015 to 2025 and rose 75% from 2020 to 2025, and moved +6.8% in 2025.
- Median home value (owners' estimate)
- $192,700
- Median gross rent
- $857
- Homes owned by their occupants
- 66.6%
- Housing units
- 9,274
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 37321?
396 business establishments had a location in this ZIP code in 2023, 27 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade78
- Health care and social assistance53
- Accommodation and food services53
- Other services (except public administration)38
- Finance and insurance35
- Construction22
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 37321?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 37332 | Evensville | 1,724 | $60k | 7.6 mi |
| 37373 | Sale Creek | 3,273 | $55k | 8.1 mi |
| 37322 | Decatur | 9,101 | $58k | 10.3 mi |
| 37308 | Birchwood | 3,188 | $80k | 11.0 mi |
| 37338 | Graysville | 3,309 | $50k | 12.4 mi |
| 37367 | Pikeville | 11,169 | $55k | 14.7 mi |
| 37336 | Georgetown | 4,483 | $67k | 14.0 mi (near) |
| 37381 | Spring City | 10,711 | $57k | 14.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.