ZIP Codes of Grainger County, TN

Population & People
Population & People
Total Population
24,551
Household Income
Household Income
Median Income
$50,666
Housing
Housing
Total Housing Units
12,299
Business & Economy
Business & Economy
Total Businesses
268
Employment
Employment
Employment Rate
48.88%
Education
Education
Bachelor's Degree+
14.69%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:6 ZIP Codes (6 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:865
Timezone:Eastern (GMT -05:00)
Local Time:11:55:05 PM
Population:24,551 [See All]
FIPS:47057
CBSA:Knoxville, TN
Land Area:342 sq mi
Water Area:22 sq mi
Coordinates:36.2813, -83.5311
Quick Link:
https://www.zip-codes.com/county/tn-grainger.asp
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Among Tennessee's 5 oldest counties
Median age 47.8.

Standout ZIPs in this County


Most Populous
Rutledge · 8,608 people
35.1% of county total
Highest Income
Blaine · $75,799 median
1.5× county average
Largest Land Area
Rutledge · 109.4 sq mi
Spans the most ground
Fastest Growth
Washburn · 24.6% (10-yr)
2,755 → 3,432 residents
Most Educated
Blaine · 18.1% bachelor's+
498 of 2,749 adults 25+

Things worth knowing about Grainger County


24,551 residents live across 6 ZIPs covering 342 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 24,056 to 24,551 from 2014 to 2024 — a +2.1% change. 3 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 37709 (Blaine, $75,799 median) and poorest ZIP 37881 (Thorn Hill, $37,443) are 23.3 miles apart — a 2.0× income gap across local geography.

Median home values vary 2.5× across this county — from $111,900 in 37881 (Thorn Hill) to $274,500 in 37709 (Blaine).

Density varies across the county — from 18 people/sq mi in 37848 (Powder Springs) to 127 in 37708 (Bean Station).

Educational attainment ranges from 8.5% bachelor's+ in 37881 (Thorn Hill) to 18.1% in 37709 (Blaine) — the breadth of educational profiles across the area.

Within Tennessee, this is the #58 most populous of 95 counties and ranks #80 for median household income .

Weighted by population, the typical household earns about $51,648 across the county — reflecting what a typical resident sees, not a simple ZIP average.

14.7% of adults age 25+ hold a bachelor's degree or higher (2,688 of 18,298 reporting).

6 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

All ZIP Codes in Grainger County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
37861RutledgeStandard8,608$52,265109.40.1%
37708Bean StationStandard6,512$42,15251.3-0.3%
37709BlaineStandard4,177$75,79942.211.0%
37888WashburnStandard3,432$45,66957.224.6%
37881Thorn HillStandard1,677$37,44373.1-24.8%
37848Powder SpringsStandard1458.2-19.0%

Adjacent & Nearby Counties