Washington County, Tennessee Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 12th-largest in Tennessee
The population of Washington County, Tennessee is 134,693 as of the 2023 American Community Survey, making it the 12th-largest county in Tennessee. The median household income is $61,051, the median home value is $231,700, and the median age is 40.3.
The population of Washington County has grown 13.2% since 2010 (123,393 → 139,642), a +0.89% annualized rate.
134,693
Population
+0.89%
Annual growth
412
People / sq mi
$61,051
Median Income
$231,700
Median Home Value
Washington County covers 327 sq mi of land at 412.5 people per square mile.
About Washington County, TN
What distinguishes Washington County is density: among the most densely settled of US counties, around 412 people per square mile. With 134,693 residents, Washington County is a county in Tennessee. It ranks #12 among counties in Tennessee by population.
The typical household here earns about $61,051, below the US median of $78,538. About 9.7% of residents live below the federal poverty level, below the national 12.4%. The median home value is $231,700, with typical rent around $951.
About 33.5% of adults 25 and older have a bachelor’s degree, near the 35.0% national figure. A solid 10.4% of workers are based at home, below the national 14.0%, and the average commute runs about 22 minutes each way.
That density explains much of the rest of the profile in Washington County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Washington County Population History (2010-2024)
The county of Washington County had a population of 123,393 in 2010 and 139,642 in 2024, a 13.2% growth over 14 years. The peak was 139,642 in 2024. Average annual growth rate: 0.89%.
139,642
Population (2024)
123,393
Population (2010)
139,642
Peak (2024)
0.89%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 123,393 |
| 2011 | 123,910 |
| 2012 | 124,914 |
| 2013 | 125,454 |
| 2014 | 125,821 |
| 2015 | 126,238 |
| 2016 | 127,439 |
| 2017 | 127,869 |
| 2018 | 129,025 |
| 2019 | 129,670 |
| 2020 | 133,225 |
| 2021 | 133,473 |
| 2022 | 136,339 |
| 2023 | 138,628 |
| 2024 | 139,642 |
Race & Ethnicity
| White | 87.7% |
| 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
50.7%
Female
49.3%
Male
18.6%
Age 65+
Age Distribution
Children (under 15): 15.2% · Seniors (65+): 18.6%
Income & Poverty
| Median household income | $61,051$-6,046 vs state |
| Mean household income | $85,716 |
| Per-capita income | $36,493 |
| Poverty rate | 9.7%-0.2% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 56.9% |
Top Industries by Employment
The largest employment sector in Washington County is professional & business services, accounting for 27.7% of workers.
How residents commute
0.3%
Drive alone
1.4%
Carpool
80.2%
Public transit
10.4%
Work from home
21.5 min
Avg commute
Housing
$231,700$-25,100 vs state
Median home value
$951
Median rent
64.4%
Homeownership rate
61,426
Total housing units
91.5%
Occupied
8.5%
Vacant
35.6%
Renter-occupied
Social & access
89.5%
With health insurance
93.7%
With broadband internet
37.5%
Foreign-born
8.9%
Veterans (18+)
16.5%
With a disability
95.2%
Speak language other than English at home
Education
91.1%
High School+
33.5%
Bachelor's+
Largest cities in Tennessee
Other counties in Tennessee
Part of Tennessee
Metro areas in Tennessee
County rankings
Frequently Asked Questions
Washington County, Tennessee has a population of 134,693 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 12th-largest county in Tennessee. Population density is 412 people per square mile.
The population of Washington County has grown 13.2% since 2010 (123,393 → 139,642), a +0.89% annualized rate.
The median household income in Washington County, Tennessee is $61,051, with mean (average) household income of $85,716 and per-capita income of $36,493. 9.7% of residents live below the federal poverty level.
In Washington County, the largest racial and ethnic groups are White (87.7%), 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 Washington County, Tennessee is 40.3 years. Residents are 50.7% female and 49.3% male.
The median home value in Washington County is $231,700 and median monthly rent is $951. 64.4% of occupied housing units are owner-occupied. The county has 61,426 total housing units, 8.5% of which are vacant.
The largest employment sector in Washington County, Tennessee is professional, scientific, and management services, employing 27.7% of workers. The unemployment rate is 3.0%.
Nashville-Davidson is among the largest cities associated with Washington County, Tennessee, with a population of 684,298.
Washington County, TN Climate
Washington County, TN has an average annual temperature of 12.8°C (55°F) and receives about 1134 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.8°C
Avg Temp
1134
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 2° / 35° | 88 mm |
| February | 3° / 38° | 91 mm |
| March | 8° / 46° | 105 mm |
| April | 12° / 54° | 93 mm |
| May | 17° / 63° | 107 mm |
| June | 21° / 70° | 102 mm |
| July | 23° / 74° | 126 mm |
| August | 23° / 73° | 97 mm |
| September | 20° / 67° | 86 mm |
| October | 13° / 56° | 71 mm |
| November | 8° / 46° | 82 mm |
| December | 4° / 38° | 86 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Washington County, TN
The most comfortable months to visit Washington County, TN are typically June, September and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -4°C low). July is usually the wettest month.
Where to stay near Washington County
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Population, race, income, age, and trends across Tennessee
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.