Williamson County, Tennessee
Williamson County, Tennessee, has 272,061 residents (July 2025 estimate). Its county seat is Franklin. It uses Central Time and covers 583 sq mi (1,510 km²) of land.
- Resident population, July 2025
- 272,061
- Land area
- 583 sq mi (1,510 km²)
- County seat or government
- Franklin
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $135,594 ± $4,044
- Median home value
- $751,900 ± $14,835
- Median rent, with utilities
- $1,969 ± $53
- Homes lived in by their owners
- 78.8% ± 0.9 points
- County type
- County
- Metro or micro area
- Nashville-Davidson--Murfreesboro--Franklin, TN metro areaCentral county
- Water area
- 1.16 sq mi (3.01 km²)
- State
- Tennessee
- County code (FIPS)
- 47187
- Coordinates (central point)
- 35.894845, -86.897888
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Williamson County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 3706467,513 people
- 3840167,482 people
- 3702761,630 people
- 3717453,900 people
- 3722141,935 people
- 3706731,556 people
- 3713524,409 people
- 3721522,018 people
- 3706920,209 people
- 3717918,043 people
- 3706213,851 people
- 370467,310 people
16 ZIP Code areas overlap Williamson County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Williamson County, largest first
- Williamson County School District219,821 people
- Franklin Special School District40,530 people
- Williamson County School District in Franklin40,530 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Franklin, Tennessee (city)87,133 people
- Smyrna, Tennessee (town)56,692 people
- Spring Hill, Tennessee (city)55,765 people
- Brentwood, Tennessee (city)45,556 people
- Nolensville, Tennessee (town)15,074 people
- Fairview, Tennessee (city)10,009 people
- Thompson's Station, Tennessee (town)8,294 people
- Eagleville, Tennessee (city)999 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Davidson County, Tennessee20 mi north
- Maury County, Tennessee22 mi southwest
- Rutherford County, Tennessee27 mi east
- Cheatham County, Tennessee27 mi northwest
- Marshall County, Tennessee30 mi south
- Dickson County, Tennessee31 mi northwest
- Hickman County, Tennessee33 mi west
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.