Chattanooga, TN 37421 ZIP Code Profile

Related Place Profiles:
Chattanooga, TN

Camera Icon Photos of the local Chattanooga, TN area

ZIP Code 37421: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Chattanooga, TN 37421

  • ZIP Code Type: STANDARD
  • County: Hamilton County
  • Centroid: Latitude 35.025, Longitude -85.145
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 2,484
  • PO Box Addresses: 0
  • Residential Addresses: 21,815
    • Multi-Family Addresses: 5,489
    • Single Family Addresses: 16,326

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


37421 ZIP Code Map

Search the map for:

Chattanooga, TN 37421 Data & Demographics (As of July 1, 2017)


Total Population 50,778
Daytime Population: Workers 39,235
Daytime Population: Residents 24,566
Total Daytime Population (TDP) 63,801
Ratio TDP/Total Population1 1.26
Population in Households 49,084
Population in Familes 38,392
Population in Group Qrtrs 1,694
Population Density2 1,554
Diversity Index3 52


Median Household Income $59,684
Average Household Income $81,405
Per Capita Income $34,737


Total Housing Units 22,447 (100%)
Owner Occupied HU 12,539 (55.9%)
Renter Occupied HU 8,492 (37.8%)
Vacant Housing Units 1,416 ( 6.3%)
Median Home Value $193,407
Average Home Value $235,188


Total Households 21,031
Average Household Size 2.33
Family Households 12,937
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 1.01% 0.99%
Households 0.89% 0.93%
Families 0.72% 0.83%
Median Household Income   2.63%
Per Capita Income   2.25%

Chattanooga, TN 37421 - Peer Comparisons by Rank and Percentile

The table below compares 37421 to the other 616 ZIP Codes in Tennessee by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 16 98th
Population Density # 64 90th
Diversity Index # 66 89th
Median Household Income # 68 89th
Per Capita Income # 42 93rd

Additional comparisons and rankings can be made with a VERY EASY TO USE Tennessee Census Data Comparison Tool.

Tennessee Research Tools

Tennessee Census Data Comparison Tool

Compare Tennessee Census Data
Highest or Lowest: