6th most populous of 95
With 269,136 residents in 2024, Williamson County ranks 6th by population among Tennessee's 95 counties and is home to 3.7% of the state's residents.
Williamson County is home to 269,136 people (2024 estimate) on 583 square miles of land. This page brings together official U.S. Census Bureau population estimates since 2000, the components of change—births, deaths and migration—American Community Survey indicators on income, housing, poverty and education, BEA economic accounts and BLS unemployment.
Key indicators
Population
269,136
July 1, 2024 estimate
2020 Census base
247,777
April 1, 2020
Change since 2020
+8.6%
2020–2024
Land area
583 mi²
1,510 km²
Population density
461.7 /mi²
2024 estimate ÷ land area
Births
2,368
Year to July 1, 2024
Deaths
1,560
Year to July 1, 2024
Natural change
+808
Births minus deaths, 2024
Net migration
+3,036
Domestic + international, 2024
Per capita personal income
$139,704
BEA, 2024
Gross domestic product
$38.8 billion
BEA, current dollars, 2024
Median household income
$135,594
ACS 2020–2024 5-year
Poverty rate
4.6%
ACS 2020–2024 5-year
Bachelor’s degree or higher
62.7%
Age 25+, ACS 2020–2024 5-year
Foreign-born residents
8.5%
ACS 2020–2024 5-year
Median home value
$751,900
ACS 2020–2024 5-year
Unemployment rate
2.7%
BLS annual average, 2024
Historical data
Pick an indicator to see its long-run evolution.
Population
2000–2024269,136▲ 110%
U.S. Census Bureau: intercensal estimates 2000–2009, Vintage 2020 (2010–2019) and Vintage 2024 (2020–2024), July 1.
Data summary
| Indicator | Value | Year and source |
|---|---|---|
| Population estimate | 269,136 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 183,182 | 2010 · U.S. Census Bureau |
| Population, 2000 | 128,134 | July 1, 2000 · Census intercensal |
| Change since 2000 | +110.0% | 2000–2024 · Census |
| International migration | +1,291 | 2024 · Census Vintage 2024 |
| Domestic migration | +1,745 | 2024 · Census Vintage 2024 |
| Birth rate | 8.8 per 1,000 | 2024 · calculated |
| Death rate | 5.8 per 1,000 | 2024 · calculated |
| Population rank in Tennessee | 6th of 95 | 2024 · calculated |
| Per capita personal income | $139,704 | BEA, 2024 · official |
| Gross domestic product | $38.8 billion | BEA, current dollars, 2024 · official |
| Median household income | $135,594 | ACS 2020–2024 5-year · official |
| Poverty rate | 4.6% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 62.7% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 8.5% | ACS 2020–2024 5-year · official |
| Median home value | $751,900 | ACS 2020–2024 5-year · official |
| Median gross rent | $1,969/month | ACS 2020–2024 5-year · official |
| Median age | 40.4 years | ACS 2020–2024 5-year · official |
| Households | 92,214 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 78.8% | ACS 2020–2024 5-year · official |
Williamson County in context
Comparable indicators for Williamson County, Tennessee and the United States.
| Indicator | County | Tennessee | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | +8.6% | +4.6% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 8.8 | 11.5 | 10.6 | 2024 |
| Death rate (per 1,000) | 5.8 | 11.0 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 11.3 | 10.5 | 8.2 | 2024 |
| Population density (/mi²) | 461.7 | 175.3 | 96.3 | 2024 |
| Per capita personal income | $139,704 | $66,504 | $73,204 | BEA, 2024 |
| Median household income | $135,594 | $69,595 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 4.6% | 13.8% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 62.7% | 31.1% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 8.5% | 6.1% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $751,900 | $286,700 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $1,969/month | $1,189/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 40.4 years | 38.9 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 78.8% | 66.9% | 65.2% | ACS 2020–2024 5-year |
Cities & towns
2 cities · choose how to order them
Did you know? Williamson County
A quarter century of change
Its population went from 128,134 in 2000 to 269,136 in 2024, a change of +110.0%, compared with +26.7% for Tennessee as a whole.
Births and deaths
In the year to July 2024 the county recorded 2,368 births and 1,560 deaths, so births outnumbered deaths by 808.
Record population
Annual Census estimates since 2000 put the county's highest population in 2024, at 269,136.
6th in density
Williamson County has about 461.7 residents per square mile of land, ranking 6th of 95 counties; Tennessee averages 175.3.
Household income rank
With a median household income of $135,594 (ACS 2020–2024 5-year), the county ranks 1st of 95 Tennessee counties; the state median is $69,595.
Size of the economy
Its economy produced $38.8 billion of GDP in 2024 (BEA), 4th largest among 95 Tennessee counties.
Latest economic growth
Real GDP grew 0.9% in 2024, adjusted for inflation (BEA, chained 2017 dollars).
Sources and methodology
- U.S. Census Bureau — County population totals and components, Vintage 2024
- U.S. Census Bureau — County estimates 2010–2020
- U.S. Census Bureau — Intercensal estimates 2000–2010
- U.S. Census Bureau — Gazetteer files (land area)
- U.S. Census Bureau — American Community Survey 2020–2024 5-year
- U.S. Bureau of Economic Analysis — Regional economic accounts
- U.S. Bureau of Labor Statistics — LAUS