ZIP code · Knoxville · Tennessee · United States
ZIP code 37921 — Knoxville
ZIP code 37921 serves Knoxville, Tennessee.
- Postal code
- 37921Single source Value from one source, not cross-checked.
- City
- Knoxville
- County
- Knox FIPS 47093
- State
- Tennessee
- Country
- United States
- Coordinates
- 35.9793, -84.0030 — precision precise (locality)
View on OpenStreetMap - Population
- 29,064 (ZCTA, ACS 5-year)
- Population density
- 1,828 / sq mi
- Land area
- 15.9 sq mi (41.2 km²) (ZCTA, ACS 5-year)
- Median household income
- $57,813
- Per-capita income
- $29,725
- Median age
- 34
- Households
- 11,518
- Housing units
- 12,969
- Median home value
- $204,300
- Median gross rent
- $1,147 / month
- Congressional district
- TN-2 (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
- Area code
- 865Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 37921 with another ZIP · ZIPs within 25 miles · distance from 37921
Map of ZIP code 37921
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Jan (avg low 26°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 48 | 53 | 61 | 71 | 79 | 86 | 88 | 88 | 83 | 72 | 61 | 51 |
| Avg low °F | 26 | 29 | 36 | 44 | 54 | 62 | 66 | 65 | 59 | 46 | 35 | 30 |
| Precip in | 5.2 | 5.1 | 5.3 | 5.3 | 4.5 | 4.0 | 5.8 | 3.4 | 4.1 | 3.0 | 4.1 | 5.9 |
NOAA 1991–2020 climate normals from the nearest station: KNOXVILLE EXP STN (6.2 mi) · NOAA NCEI
Places in ZIP 37921
- 10 schools
- 1 colleges & universities
- 4 hospitals & clinics
- 3 doctors & dentists
- 3 pharmacies
- 3 supermarkets
- 29 restaurants & cafés
- 15 parks
- 17 playgrounds
- 7 gyms & sports centres
- 2 libraries
- 2 post offices
- 57 places of worship
- 4 banks
- 16 gas stations
- 2 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page