Williamson County, Tennessee Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 6th-largest in Tennessee

The population of Williamson County, Tennessee is 254,609 as of the 2023 American Community Survey, making it the 6th-largest county in Tennessee. The median household income is $131,202, the median home value is $673,700, and the median age is 40.3.

The population of Williamson County has grown 46.2% since 2010 (184,082 → 269,136), a +2.75% annualized rate.

Williamson County within Tennessee · Source: US Census TIGER/Line via us-atlas

254,609

Population

+2.75%

Annual growth

437

People / sq mi

$131,202

Median Income

$673,700

Median Home Value

Williamson County covers 583 sq mi of land at 436.8 people per square mile.

About Williamson County, TN

Williamson County is a county in Tennessee with a population of 254,609. It ranks #6 among counties in Tennessee by population. The median age is 40.3, older than the national median. The population is 49.4% male and 50.6% female.

The median household income in Williamson County is $131,202, above the US median of $74,580. 3.1% of residents live below the federal poverty level. Home values sit at a median of $673,700, with monthly rent averaging $1,895. The homeownership rate of 79.8% is higher than the national rate of 64.8%.

Educational attainment in Williamson County reflects 61.8% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 25.8% of workers primarily work from home, noticeably above the national work-from-home rate of 14.2%. The average commute is 28.0 minutes each way.

Williamson County Population History (2010-2024)

The county of Williamson County had a population of 184,082 in 2010 and 269,136 in 2024, a 46.2% growth over 14 years. The peak was 269,136 in 2024. Average annual growth rate: 2.75%.

269,136

Population (2024)

184,082

Population (2010)

269,136

Peak (2024)

2.75%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	184,082	-	-	estimate
2011	188,464	+4,382	+2.38%	estimate
2012	193,207	+4,743	+2.52%	estimate
2013	199,177	+5,970	+3.09%	estimate
2014	205,395	+6,218	+3.12%	estimate
2015	211,713	+6,318	+3.08%	estimate
2016	219,105	+7,392	+3.49%	estimate
2017	226,373	+7,268	+3.32%	estimate
2018	232,517	+6,144	+2.71%	estimate
2019	238,556	+6,039	+2.60%	estimate
2020	249,616	+11,060	+4.64%	estimate
2021	256,155	+6,539	+2.62%	estimate
2022	261,536	+5,381	+2.10%	estimate
2023	265,312	+3,776	+1.44%	estimate
2024	269,136	+3,824	+1.44%	estimate

Race & Ethnicity

White	82.8%
Black or African American	3.8%
Asian	0.0%
Hispanic or Latino (any race)	1.0%
Two or More Races	0.0%

Age & Sex

40.3

Median Age

50.6%

Female

49.4%

Male

14.3%

Age 65+

Age Distribution

Under 5

5.4%

5–9

7.5%

10–14

8.0%

15–19

7.7%

20–24

5.5%

25–34

8.9%

35–44

14.7%

45–54

15.1%

55–59

6.6%

60–64

6.2%

65–74

8.9%

75–84

4.1%

85+

1.3%

Children (under 15): 20.9% · Seniors (65+): 14.3%

Income & Poverty

Median household income	$131,202+$64,105 vs state
Mean household income	$177,673
Per-capita income	$64,632
Poverty rate	3.1%-6.8% vs state
Unemployment rate	1.3%
Employment-to-population	65.6%

Top Industries by Employment

Professional & business services

24.6%

Finance & real estate

15.7%

Information

11.6%

Education & health care

8.6%

Manufacturing

7.6%

Construction

4.6%

Arts, entertainment & food

4.6%

Public administration

3.1%

The largest employment sector in Williamson County is professional & business services, accounting for 24.6% of workers.

How residents commute

0.1%

Drive alone

0.7%

Carpool

66.9%

Public transit

25.8%

Work from home

28.0 min

Avg commute

Housing

$673,700+$416,900 vs state

Median home value

$1,895

Median rent

79.8%

Homeownership rate

94,418

Total housing units

96.1%

Occupied

3.9%

Vacant

20.2%

Renter-occupied

Social & access

95.8%

With health insurance

98.1%

With broadband internet

51.3%

Foreign-born

5.5%

Veterans (18+)

7.8%

With a disability

90.6%

Speak language other than English at home

Education

95.9%

High School+

61.8%

Bachelor's+

Largest cities in Tennessee

Nashville-Davidson (684,298)Memphis (629,063)Knoxville (193,721)Chattanooga (182,832)Clarksville (171,897)Murfreesboro (157,547)Franklin (85,575)Johnson City (71,455)Jackson (68,098)Hendersonville (62,390)All Tennessee cities →

Other counties in Tennessee

Shelby County (922,195)Davidson County (709,846)Knox County (487,401)Hamilton County (370,913)Rutherford County (351,591)Montgomery County (227,957)Sumner County (200,553)Sullivan County (159,693)Wilson County (153,587)Blount County (137,747)All Tennessee counties →

Part of Tennessee

Tennessee demographic profile All Tennessee data →

Metro areas in Tennessee

Nashville (2,043,713)Memphis (1,341,606)Knoxville (919,553)Chattanooga (569,333)Clarksville (328,626)Kingsport (309,580)Johnson City (208,934)Jackson (180,844)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Williamson County, Tennessee has a population of 254,609 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 6th-largest county in Tennessee. Population density is 437 people per square mile.

The population of Williamson County has grown 46.2% since 2010 (184,082 → 269,136), a +2.75% annualized rate.

The median household income in Williamson County, Tennessee is $131,202, with mean (average) household income of $177,673 and per-capita income of $64,632. 3.1% of residents live below the federal poverty level.

In Williamson County, the largest racial and ethnic groups are White (82.8%), Black or African American (3.8%), Hispanic or Latino (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Williamson County, Tennessee is 40.3 years. Residents are 50.6% female and 49.4% male.

The median home value in Williamson County is $673,700 and median monthly rent is $1,895. 79.8% of occupied housing units are owner-occupied. The county has 94,418 total housing units, 3.9% of which are vacant.

The largest employment sector in Williamson County, Tennessee is professional, scientific, and management services, employing 24.6% of workers. The unemployment rate is 1.3%.

Nashville-Davidson is among the largest cities associated with Williamson County, Tennessee, with a population of 684,298.