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Williamson County, TN
5 cities and towns and 8 ZIP codes in Williamson County, Tennessee.
Population
260,351
Land area
583sq mi
People per sq mi
447
ZIP codes
8
Cities and towns in Williamson County
Williamson County at a glance
- Williamson County is about 2.6 times as dense as Tennessee as a whole.
- It is the 6th most populous of 95 counties in Tennessee.
- Households here earn a median of $135,594 a year, 95% more than the Tennessee figure of $69,595.
- A typical owner-occupied home is valued at $751,900 (about 2.6 times the Tennessee figure) and median rent is $1,969 a month.
- The biggest population centers are Franklin (87,133), Brentwood (45,556) and Nolensville (15,074).
Local data for Williamson County, TN
Counts from official public data
- Hospitals2
- Emergency Rooms2
- Nursing Homes5
- Schools80
- Colleges3
- Libraries7
- Banks112
- Post Offices8
- Parks94
- Grocery Stores79
- Restaurants771
- Affordable Housing2
- Home Health Agencies2
- Hospice Care3
- Dialysis Centers2
- Rehab & Long-Term Care Hospitals1
- Community Health Centers11
- Mental Health & Addiction Treatment17
- Private Schools20
- Community Colleges & Trade Schools2
- Toxic Release Facilities5
- Historic Places95
Housing and community stats
Williamson County, TN, American Community Survey 2020-2024
Median household income
$135,594
Poverty rate
4.6%
Median home value
$751,900
Prices +2.8% in a year
Median rent
$1,969/mo
Homeownership
78.8%
Bachelor's or higher
62.7%
Median age
40.4
Average commute
27.9 min
Largest reported origins and ancestries: German Americans (33,696), Irish Americans (30,305), Italian Americans (9,993).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.0%
Aug 2026, +0.1 pts in a year
Average annual pay
$90,424
151,470 jobs, 2025
Income per person
$139,704
BEA, 2024
Federal spending
$1.91B
FY 2026, $7,710 per person
PPP loans
$893M
11,207 loans, 92,800 jobs reported
Campaign donations
$7.4M
Itemized, 2026 cycle
How people get to work
Williamson County, TN, workers 16 and older. American Community Survey 5-year estimates
- Drove alone64.9%
- Carpooled5.1%
- Public transit0.1%
- Walked0.5%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other1.1%
- Worked from home28.3%
Average one-way commute: 27.9 minutes for people who do not work from home.
Environment and hazard risk
Williamson County, TN, from FEMA, NOAA and EPA
Natural hazard risk
Relatively Moderate
Top: cold wave
Storm events since 1996
877
Most often thunderstorm wind
Flood insurance policies
1,284
2.4% of homes, county
July high / Jan low
91° / 29°F
53.8 inches of rain a year
Hazards, floods and storm historyCheck a flood zone95 historic places
Health statistics
Share of adults in Williamson County, TN, CDC PLACES estimates
Obesity
29.4%
U.S. 33.3% -3.9 pts
Diabetes
10.0%
U.S. 12.1% -2.1 pts
Smoking
10.4%
U.S. 12.8% -2.4 pts
Uninsured (18-64)
6.9%
U.S. 11.1% -4.2 pts
Cities, towns and ZIP codes in Williamson County
Population shown
Frequently asked questions
- What is the largest city in Williamson County, TN?
- Franklin is the largest city or town in Williamson County, with about 87,133 residents.
- How many ZIP codes are in Williamson County?
- Williamson County includes 8 ZIP Code Tabulation Areas, including 37027, 37046, 37062, 37064, 37067.
- What is the population of Williamson County, TN?
- About 260,351 people live in Williamson County, based on American Community Survey 5-year estimates.
- What counties border Williamson County?
- Williamson County borders Davidson County, Rutherford County, Maury County, Dickson County, Cheatham County, Marshall County, Hickman County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023