Williamson County, Tennessee Population 2021

Williamson County, Tennessee's estimated population is 251,280 with a growth rate of 2.63% in the past year according to the most recent United States census data. Williamson County, Tennessee is the 7th largest county inTennessee. The 2010 Population was 184,143 and has seen a growth of 36.46% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
2021251,2806,4342.63%
2020244,8466,4342.70%
2019238,4126,4342.77%
2018231,9785,9302.62%
2017226,0487,1453.26%
2016218,9037,2983.45%
2015211,6056,2713.05%
2014205,3346,1913.11%
2013199,1435,9323.07%
2012193,2114,7102.50%
2011188,5014,3582.37%
2010184,143103,122127.28%
199081,02122,91339.43%
198058,10823,77869.26%
197034,3309,06335.87%
196025,2679603.95%
195024,307-913-3.62%
194025,2202,37510.40%
193022,845-564-2.41%
192023,409-804-3.32%
191024,213-2,216-8.38%
190026,4291080.41%
189026,321-1,992-7.04%
188028,3132,98511.79%
187025,3281,5016.30%
186023,827-3,374-12.40%
185027,2011950.72%
184027,0063681.38%
183026,6385,99829.06%
182020,6407,48756.92%
181013,15310,285358.61%
18002,8680.00%
2021 Growth Rate
2.63% (6,434)
County Website
Founded
October 26, 1799
County Seat
2010 Population
184,143
Growth Since 2010
36.46% (67,137)
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Williamson County, Tennessee Population Growth

Population by Race

Race Population Percentage
White200,07788.77%
Asian9,4954.21%
Black or African American9,2814.12%
Two or More Races5,2912.35%
Some Other Race9580.43%
American Indian and Alaska Native2270.10%
Native Hawaiian and Other Pacific Islander600.03%
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Williamson County, Tennessee Population by Race

Williamson County, Tennessee Population Pyramid $2021

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Williamson County, Tennessee Median Age

39.1


Total

38.5


Male

39.7


Female

Williamson County, Tennessee Adults

There are 163,602 adults, (28,691 of whom are seniors) in Williamson County, Tennessee.

Williamson County, Tennessee Age Dependency

67.1

Age Dependency Ratio

21.3

Old Age Dependency Ratio

45.8

Child Dependency Ratio

Williamson County, Tennessee Sex Ratio

Female

115,147

51.09%

Male

110,242

48.91%

Williamson County, Tennessee Population by Age

Williamson County, Tennessee Renter vs Owner Occupied by Household Type

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Williamson County, Tennessee Household Types

Type Owner Renter
Non Family59.3%40.7%
Female65%35%
Male71.1%28.9%
All80.6%19.4%
Married88.4%11.6%

80.6%

Rate of Home Ownership

Williamson County, Tennessee Households and Families

Type Count Average Size Owned
All77,8552.8980.6
Married55,0683.2988.4
Non Family15,1271.2759.3
Female5,8583.1665
Male1,8023.2571.1

3.24

Average Family Size

2.89

Average Household Size

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Williamson County, Tennessee Households by Type

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Education Attained Count Percentage
Less Than 9th Grade2,2431.53%
9th to 12th Grade4,5853.13%
High School Graduate19,40213.26%
Some College23,04115.74%
Associates Degree9,5086.50%
Bachelors Degree55,27437.77%
Graduate Degree32,29222.07%
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Williamson County, Tennessee Educational Attainment by Sex (over 25)

Williamson County, Tennessee Educational Attainment by Race

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Race Total High School Bachelors
White126,256121,71576,633
Black6,2535,4822,560
Asian6,1895,9775,077
Hispanic5,4824,1931,962
2+ Races2,0562,0151,268
Other Race555516249
Native American17916166
Islander3434

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 82.03%.

Williamson County, Tennessee Educational Attainment by Race

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Name Average Male Female
Overall$61,870$85,763$43,815
Less Than 9th Grade$24,387$33,085$17,169
High School Graduate$37,755$43,862$30,444
Some College$45,003$60,668$31,467
Bachelors Degree$71,637$97,431$47,603
Graduate Degree$93,595$117,575$61,817

$61,870

Average Earnings

$85,763

Average Male

$43,815

Average Female

Williamson County, Tennessee Earnings by Educational Attainment

Williamson County, Tennessee Language by Age

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Williamson County, Tennessee Language

91.49% of Williamson County, Tennessee residents speak only English, while 8.51% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 3.62% of the population.

Williamson County, Tennessee Language

Williamson County, Tennessee Poverty by Race

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Name Total In Poverty Poverty Rate
White189,9726,5393.44%
Hispanic10,7361,31412.24%
Black9,2421,03111.16%
Asian9,4736366.71%
Multiple5,1722775.36%
Other95111812.41%

4.35%

Overall Poverty Rate

3.51%

Male Poverty Rate

5.16%

Female Poverty Rate

Poverty in Williamson County, Tennessee

The race most likely to be in poverty in Williamson County, Tennessee is Other, with 12.41% below the poverty level.

The race least likely to be in poverty in Williamson County, Tennessee is White, with 3.44% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.01%. Among those working part-time, it was 6.02%, and for those that did not work, the poverty rate was 8.81%.

Williamson County, Tennessee Poverty

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Name Poverty
Less Than 9th Grade16.12%
High School7.16%
Some College3.81%
Bachelors or Greater1.83%

Williamson County, Tennessee Poverty Rate by Education

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Rate Poverty
Male Unemployed17.26%
Female Unemployed15.00%
Female Employed3.42%
Male Employed1.70%

Williamson County, Tennessee Poverty Rate by Employment Status and Sex

Williamson County, Tennessee Income by Household Type

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Name Median Mean
Households$112,962$149,836
Families$126,774$165,293
Married Families$134,042$176,865
Non Families$54,634$80,917
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Income by Household Type

Williamson County, Tennessee Marital Status

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Marriage Rates

64.6%

Overall Marriage Rate

67.7%

Male Marriage Rate

61.8%

Female Marriage Rate

Williamson County, Tennessee Married by Age and Sex

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Williamson County, Tennessee Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

Williamson County, Tennessee Marital Status by Race

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Williamson County, Tennessee Marital Status

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9,928

Number of Veterans

9,053

Male Veterans

875

Female Veterans

War Veterans
Vietnam3,552
First Gulf War2,292
Second Gulf War1,653
Korea688
World War II316

Williamson County, Tennessee Veterans by War

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Age Group Veterans
65 to 742,891
35 to 542,545
75+2,162
55 to 641,569
18 to 34761

Williamson County, Tennessee Veterans by Age

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Name Veterans % of Total
White9,1586.26%
Black3715.28%
2+ Races2559.74%
Asian1382.04%
Hispanic1261.88%
Islander617.65%

Williamson County, Tennessee Veterans by Race

Williamson County, Tennessee Veterans by Education

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2.23%

Veteran Poverty Rate

22.19%

Veteran Disability Rate

Williamson County, Tennessee Veterans by Education

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68.8%

Labor Force Participation

66.8%

Employment Rate

2.8%

Unemployment Rate

Williamson County, Tennessee Employment by Age

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Williamson County, Tennessee Employment by Race

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Williamson County, Tennessee Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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41.07%

Born in Williamson County, Tennessee

92.39%

Native Born

7.61%

Foreign Born

3.93%

Non Citizen

3.68%

Naturalized

Place of Birth

92.39% of Williamson County, Tennessee residents were born in the United States, with 41.07% having been born in Tennessee. 3.93% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Williamson County, Tennessee Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources