Residential delivery area · Tennessee
ZIP Code 37421: Chattanooga, TN
ZIP code 37421 is in Chattanooga, Tennessee, entirely in Hamilton County (Census 2020 ZIP-county file). About 53,000 people live there (Census Bureau, ACS 2020-2024), the most populous of Chattanooga's 16 residential ZIP codes. Median household income is $82,517 (Census Bureau, ACS 2020-2024). By Census place, 77% of its land lies in Chattanooga; 23% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Chattanooga · 16 residential ZIPs
- County
- Hamilton County
- Census places
- Chattanooga
- Neighborhoods
- Cambridge Estates, Concord Heights, Creekwood Terrace, Edgemont Forest, Ela Wada Terrace, Engleton Heights and 6 more GeoNames
- Metro area
- Chattanooga, TN-GA
- House district
- TN-3 119th Congress
- State
- Tennessee
- Time zone
- Eastern
- Land area
- 31.7 sq mi · 1,671 people per sq mi
Where is ZIP code 37421?
37421 centers on 35.027°, -85.154° and covers 31.7 square miles of land plus 0.0 of water. It borders 6 ZIP codes: 37411, 37412, 37416, 37406, 37363, 30736.
The map draws ZIP code areas only. For the streets inside 37421, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 37421 compare with the rest of Chattanooga?
| Measure | 37421 | In Chattanooga | In Hamilton County | In TN |
|---|---|---|---|---|
| People (ACS 2020-2024) | 52,985 | 1st of 16 | 1st of 31 | 20th of 636 |
| Median household income | $83k | 1st of 10 | 6th of 21 | 89th of 425 |
| Median home value | $334k | 5th of 13 | 8th of 24 | 97th of 436 |
Its median household income is higher than in 65% of U.S. residential ZIP codes, and it is denser than 83% 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 37421?
The 2020 Census counted 51,686 people in 37421; the ACS, which samples households over 2020-2024, estimates 52,985. Between the 2010 and 2020 censuses its population grew 11.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 52,985
- 2020 Census count
- 51,686+11.8% since 2010 (46,228)
- Households
- 22,278
- Median age
- 40.8
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 37421?
Of the 52,985 people the ACS estimates in 37421, 19.5% are under 18 and 19.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (60.5%), then Black (not Hispanic) (22.1%).
- Under 1819.5%
- 18 to 6461.1%
- 65 and older19.4%
- White, not Hispanic60.5%
- Black, not Hispanic22.1%
- Hispanic or Latino9.5%
- Asian, not Hispanic5.1%
- Other or two or more2.8%
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 37421 earn?
Median household income is $82,517 (ACS 2020-2024), the 6th highest of the 21 ranked ZIP codes in Hamilton County. It is not measurably different from 2015-2019 ($77,576 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $82,517
- Income per person
- $47,620
- Below the poverty line
- 10.9%
- Unemployed (of the labor force)
- 3.5%
- Adults 25+ with a bachelor's degree
- 38.8%
- Adjusted gross income per tax return, 2022
- $81,86725,040 returns; wages 68% 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 37421?
FHFA's house price index for 37421, built from repeat sales and appraisals of the same homes, rose 114% from 2015 to 2025 and rose 62% from 2020 to 2025, and moved +2.0% in 2025.
- Median home value (owners' estimate)
- $333,700
- Median gross rent
- $1,405
- Homes owned by their occupants
- 60.2%
- Housing units
- 24,063
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 37421?
2,083 business establishments had a location in this ZIP code in 2023, 93 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade375
- Health care and social assistance347
- Accommodation and food services208
- Other services (except public administration)178
- Finance and insurance158
- Professional, scientific, and technical services158
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 37421?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 37411 | Chattanooga | 18,997 | $57k | 4.3 mi |
| 37412 | Chattanooga | 21,864 | $63k | 4.7 mi |
| 37416 | Chattanooga | 13,919 | $71k | 4.9 mi |
| 37406 | Chattanooga | 13,364 | $45k | 6.1 mi |
| 37363 | Ooltewah | 42,093 | $97k | 8.5 mi |
| 30736 | Ringgold, GA | 44,499 | $84k | 8.7 mi |
| 30726 | Graysville, GA | 0 | – | 3.7 mi (near) |
| 37315 | Collegedale | 1,825 | – | 5.9 mi (near) |
| 37404 | Chattanooga | 14,737 | $57k | 6.8 mi (near) |
| 37302 | Apison | 5,082 | $129k | 7.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.