Knoxville, TN 37921 ZIP Code Profile

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Knoxville, TN

ZIP Code 37921: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Knoxville, TN 37921

  • ZIP Code Type: STANDARD
  • County: Knox County
  • Centroid: Latitude 35.973, Longitude -83.987
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 1,017
  • PO Box Addresses: 92
  • Residential Addresses: 12,069
    • Multi-Family Addresses: 1,649
    • Single Family Addresses: 10,420

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 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.


37921 ZIP Code Map

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Knoxville, TN 37921 Data & Demographics (As of July 1, 2017)


Total Population 30,482
Daytime Population: Workers 18,064
Daytime Population: Residents 16,337
Total Daytime Population (TDP) 34,401
Ratio TDP/Total Population1 1.13
Population in Households 30,302
Population in Familes 23,239
Population in Group Qrtrs 180
Population Density2 1,824
Diversity Index3 52


Median Household Income $38,999
Average Household Income $51,221
Per Capita Income $20,681


Total Housing Units 13,716 (100%)
Owner Occupied HU 7,007 (51.1%)
Renter Occupied HU 5,203 (37.9%)
Vacant Housing Units 1,506 (11.0%)
Median Home Value $128,700
Average Home Value $139,664


Total Households 12,210
Average Household Size 2.48
Family Households 7,588
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 0.46% 0.58%
Households 0.31% 0.49%
Families 0.08% 0.35%
Median Household Income   1.29%
Per Capita Income   2.44%

Knoxville, TN 37921 - Peer Comparisons by Rank and Percentile

The table below compares 37921 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 # 62 90th
Population Density # 60 90th
Diversity Index # 67 89th
Median Household Income # 359 42nd
Per Capita Income # 388 37th

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

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