ZIP Code 37421
standardSource:
Chattanooga · Hamilton County · Tennessee
- Population
- 46,228
- Median income
- $82,517
- Median home value
- $333,700
- Bachelor's or higher
- 38.8%
- Land area
- 78.7 sq mi
587/sq mi
▲ 8% vs US
higher than 65% of US ZIPs
▲ 20% vs US
higher than 71% of US ZIPs
Median age 40.8
New York
ZIP code 37421 in Chattanooga, Tennessee has a population of 46,228. The median household income is $82,517, which is 8% above the national average. Median home value is $333,700, 20% above the US average. 38.8% of residents hold a bachelor's degree or higher.
ZIP code 37421 is classified by USPS as a standard delivery area and covers roughly 78.7 square miles in Chattanooga, Hamilton County, Tennessee. The area is home to 46,228 residents, producing a population density of 587 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 37421 against Tennessee and the nation.
On the economic side, the median household income for ZIP 37421 sits at $82,517 (24% above the Tennessee average), while per-capita income is $47,620. The poverty rate stands at 10.9% and the unemployment rate at 3.5%. On housing, the median home value is $333,700 (35% above the state average) with median rent at $1,405 per month, and 60.2% of occupied units are owner-occupied, a direct signal of whether 37421 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 38.8% of adults hold a bachelor's degree or higher, the median age is 40.8, and the average commute is 20 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Hamilton County, so you can benchmark 37421 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 37421
Top 5 sectors by establishment count
Which industries have the most business establishments in ZIP 37421.
- Retail trade
Retail trade
375 establishments
- Health care and social assistance
Health care and social assistance
347 establishments
- Accommodation and food services
Accommodation and food services
208 establishments
- Other services (except public administration)
Other services (except public administration)
178 establishments
- Finance and insurance
Finance and insurance
158 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 37421, Chattanooga, TN · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.
Quick Facts
46,228
Population
78.7
Area (sq mi)
587
People / sq mi
New York
Time Zone
standard
ZIP Type
Who lives in ZIP 37421?
40.8
Median Age
49.1%
Male
50.9%
Female
10.6%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$82,517
Median Household Income
+24% vs state
$47,620
Per Capita Income
10.9%
Poverty Rate
3.5%
Unemployment Rate
19.8 min
Mean Commute Time
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
24,063
Total Housing Units
22,278
Occupied Units
1,785
Vacant Units
2.30
Avg Household Size
Occupancy Type
$333,700
Median Home Value
+35% vs state
$1,405
Median Rent
1989
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+4.8%
YoY Change (2024)
278
HPI Index (2000 = 100)
+178%
Total Change Since 2000
Home values in ZIP 37421 have increased 4.8% over the past year (2024). Since 2000, this ZIP has seen +178% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +7.1% | 175 |
| 2021 | +15.1% | 202 |
| 2022 | +21.9% | 246 |
| 2023 | +8.0% | 265 |
| 2024 | +4.8% | 278 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 2,083 business establishments in ZIP 37421, employing approximately 42,723 people with a combined annual payroll of $2,101,732,000.
2,083
Businesses
42,723
Employees
$2.1B
Annual Payroll
16
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 375 | 18.0% |
| Health care and social assistance | 347 | 16.7% |
| Accommodation and food services | 208 | 10.0% |
| Other services (except public administration) | 178 | 8.6% |
| Finance and insurance | 158 | 7.6% |
| Professional, scientific, and technical services | 158 | 7.6% |
| Administrative and support and waste management and remediation services | 133 | 6.4% |
| Construction | 132 | 6.3% |
| Wholesale trade | 105 | 5.0% |
| Real estate and rental and leasing | 102 | 4.9% |
| Transportation and warehousing | 56 | 2.7% |
| Manufacturing | 40 | 1.9% |
| Information | 30 | 1.4% |
| Arts, entertainment, and recreation | 28 | 1.3% |
| Educational services | 22 | 1.1% |
| Management of companies and enterprises | 7 | 0.3% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 37421 vs 30726 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 30726 | Graysville, GA | 56 | 3.7 mi |
| 37411 | Chattanooga, TN | 17,587 | 4.3 mi |
| 37416 | Chattanooga, TN | 14,486 | 5.4 mi |
| 37412 | Chattanooga, TN | 20,951 | 4.8 mi |
| 37315 | Collegedale, TN | 1,556 | 5.8 mi |
| 37404 | Chattanooga, TN | 13,327 | 6.9 mi |
| 37406 | Chattanooga, TN | 14,627 | 6.1 mi |
| 30736 | Ringgold, GA | 41,029 | 8.6 mi |
| 37302 | Apison, TN | 3,730 | 7.7 mi |
| 37403 | Chattanooga, TN | 5,811 | 8.2 mi |
More ZIP Codes in Hamilton County
Related Areas
Frequently Asked Questions
What county is ZIP code 37421 in? ▼
What is the population of ZIP code 37421? ▼
What is the median household income in ZIP 37421? ▼
What is the average home value in ZIP 37421? ▼
What is the demographic makeup of ZIP 37421? ▼
How many businesses are in ZIP code 37421? ▼
What are the main industries in ZIP code 37421? ▼
How have home values changed in ZIP code 37421? ▼
What is the education level in ZIP code 37421? ▼
What is the average commute time in ZIP 37421? ▼
What percentage of residents own vs. rent in ZIP 37421? ▼
What is the poverty rate in ZIP code 37421? ▼
ZIP Code Research Guides
Official Data Resources for Chattanooga, TN
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.