ZIP Codes of Franklin County, TN

Population & People
Population & People
Total Population
39,839
Household Income
Household Income
Median Income
$58,079
Housing
Housing
Total Housing Units
18,494
Business & Economy
Business & Economy
Total Businesses
715
Employment
Employment
Employment Rate
54.55%
Education
Education
Bachelor's Degree+
24.16%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 9 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:9 ZIP Codes (8 Standard, 0 PO Box, 1 Unique) [See All]
Area Code:931
Timezone:Central (GMT -06:00)
Local Time:11:55:05 PM
Population:39,839 [See All]
FIPS:47051
CBSA:Winchester, TN
Land Area:587 sq mi
Water Area:21 sq mi
Coordinates:35.1645, -86.0548
Quick Link:
https://www.zip-codes.com/county/tn-franklin.asp
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Extreme education divide
Bachelor's share ranges 12.9% to 64.6% across ZIPs — a 52-point gap.

Standout ZIPs in this County


Most Populous
Winchester · 15,755 people
39.5% of county total
Highest Income
Sewanee · $71,204 median
1.2× county average
Largest Land Area
Winchester · 121.2 sq mi
Spans the most ground
Fastest Growth
Cowan · 30.1% (10-yr)
1,617 → 2,103 residents
Most Educated
Sewanee · 64.6% bachelor's+
1,152 of 1,782 adults 25+

Things worth knowing about Franklin County


39,839 residents live across 9 ZIPs covering 587 sq mi, served by 8 distinct USPS-recognized cities.

Population moved from 37,491 to 39,495 from 2014 to 2024 — a +5.3% change. 4 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 37375 (Sewanee, $71,204 median) and poorest ZIP 37306 (Belvidere, $39,375) are 15.8 miles apart — a 1.8× income gap across local geography.

Median home values vary 2.1× across this county — from $177,100 in 37318 (Cowan) to $366,700 in 37375 (Sewanee).

Density varies 1034× across the county — from 4 people/sq mi in 37376 (Sherwood) to 4,252 in 37383 (Sewanee).

Educational attainment ranges from 12.9% bachelor's+ in 37318 (Cowan) to 64.6% in 37375 (Sewanee) — the breadth of educational profiles across the area.

Within Tennessee, this is the #39 most populous of 95 counties and ranks #53 for median household income with the #44 fastest decade growth .

Hosts 1 single-entity Unique ZIP: 37383University Of The South .

Weighted by population, the typical household earns about $61,727 across the county — reflecting what a typical resident sees, not a simple ZIP average.

24.2% of adults age 25+ hold a bachelor's degree or higher (6,636 of 27,472 reporting).

8 Standard delivery, 0 PO Box only, 1 single-entity Unique ZIPs serve this county.

Stories about Franklin County


Higher-education hub

1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.

Sewanee
64.6%
3,866 residents

Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
587
square miles
Avg density
67.9
people per sq mi
Population
39,839
across 9 ZIPs
Winchester
121.2 sq mi
15,755 residents
Belvidere
114.1 sq mi
1,919 residents
Sherwood
87.8 sq mi
361 residents

All ZIP Codes in Franklin County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
37398WinchesterStandard15,755$63,730121.219.6%
37330Estill SpringsStandard7,204$70,95258.5-3.1%
37324DecherdStandard5,628$50,41767.910.0%
37375SewaneeStandard3,866$71,20468.8-8.5%
37345HuntlandStandard2,659$58,75056.214.8%
37318CowanStandard2,103$52,12512.330.1%
37306BelvidereStandard1,919$39,375114.1-38.8%
37376SherwoodStandard36187.8-24.3%
37383SewaneeUnique3440.1

Adjacent & Nearby Counties