Residential delivery area · Tennessee
ZIP Code 37721: Corryton, TN
ZIP code 37721 uses the postal name Corryton, Tennessee and lies mostly in Knox County (90% of its land) with the rest in Union County (Census 2020 ZIP-county file). About 14,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $64,892 (Census Bureau, ACS 2020-2024). By Census place, 7% of its land lies in Plainview; 93% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Corryton · its only residential ZIP
- County
- Knox County (90%); Union County (10%)
- Census places
- Plainview
- Metro area
- Knoxville, TN
- House district
- TN-2 119th Congress
- State
- Tennessee
- Time zone
- Eastern
- Land area
- 49.3 sq mi · 290 people per sq mi
Where is ZIP code 37721?
37721 centers on 36.131°, -83.815° and covers 49.3 square miles of land plus 0.0 of water. It borders 7 ZIP codes: 37806, 37779, 37938, 37924, 37918, 37709, 37807.
The map draws ZIP code areas only. For the streets inside 37721, 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 37721 compare with the rest of Knox County?
| Measure | 37721 | In Knox County | In TN |
|---|---|---|---|
| People (ACS 2020-2024) | 14,306 | 18th of 28 | 171st of 636 |
| Median household income | $65k | 18th of 23 | 196th of 425 |
| Median home value | $233k | 15th of 24 | 216th of 436 |
Its median household income is higher than in 38% of U.S. residential ZIP codes, and it is denser than 67% 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 37721?
The 2020 Census counted 14,222 people in 37721; the ACS, which samples households over 2020-2024, estimates 14,306. Between the 2010 and 2020 censuses its population grew 11.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 14,306
- 2020 Census count
- 14,222+11.7% since 2010 (12,733)
- Households
- 5,568
- Median age
- 43.3
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 37721?
Of the 14,306 people the ACS estimates in 37721, 20.9% are under 18 and 19.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (92.9%).
- Under 1820.9%
- 18 to 6460.1%
- 65 and older19.0%
- White, not Hispanic92.9%
- Other or two or more3.3%
- Black, not Hispanic1.9%
- Hispanic or Latino1.2%
- Asian, not Hispanic0.6%
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 37721 earn?
Median household income is $64,892 (ACS 2020-2024), the 18th highest of the 23 ranked ZIP codes in Knox County. It is not measurably different from 2015-2019 ($69,916 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $64,892
- Income per person
- $33,223
- Below the poverty line
- 7.8%
- Unemployed (of the labor force)
- 3.9%
- Adults 25+ with a bachelor's degree
- 17.8%
- Adjusted gross income per tax return, 2022
- $67,7736,250 returns; wages 76% 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 37721?
FHFA's house price index for 37721, built from repeat sales and appraisals of the same homes, rose 123% from 2015 to 2025 and rose 74% from 2020 to 2025, and moved +7.2% in 2025.
- Median home value (owners' estimate)
- $233,300
- Median gross rent
- $973
- Homes owned by their occupants
- 82.3%
- Housing units
- 5,886
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 37721?
108 business establishments had a location in this ZIP code in 2023, 12 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction25
- Other services (except public administration)23
- Retail trade13
- Administrative and support and waste management and remediation services13
- Accommodation and food services12
- Health care and social assistance7
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 37721?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 37806 | Mascot | 3,674 | $60k | 5.8 mi |
| 37779 | Luttrell | 3,649 | $51k | 6.4 mi |
| 37938 | Knoxville | 17,437 | $84k | 6.9 mi |
| 37924 | Knoxville | 14,420 | $80k | 7.2 mi |
| 37918 | Knoxville | 45,971 | $70k | 7.7 mi |
| 37709 | Blaine | 4,177 | $76k | 8.7 mi |
| 37807 | Maynardville | 11,069 | $63k | 8.9 mi |
| 37871 | Strawberry Plains | 9,926 | $71k | 9.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.