Williamson County, Texas Population 2021

Williamson County, Texas's estimated population is 638,727 with a growth rate of 3.92% in the past year according to the most recent United States census data. Williamson County, Texas is the 13th largest county in Texas. The 2010 Population was 426,287 and has seen a growth of 49.83% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021638,72724,0883.92%
2020614,63924,0884.08%
2019590,55124,0884.25%
2018566,46320,2123.70%
2017546,25118,6293.53%
2016527,62220,4894.04%
2015507,13319,2203.94%
2014487,91317,8963.81%
2013470,01714,2673.13%
2012455,75013,7193.10%
2011442,03115,7443.69%
2010426,287286,736205.47%
1990139,55163,03082.37%
198076,52139,216105.12%
197037,3052,2616.45%
196035,044-3,809-9.80%
195038,853-2,845-6.82%
194041,698-2,448-5.55%
193044,1461,2122.82%
192042,9347061.67%
191042,2284,15610.92%
190038,07212,16346.95%
189025,90910,75470.96%
188015,1558,787137.99%
18706,3681,83940.60%
18604,5292,961188.84%
18501,5680.00%
2021 Growth Rate
3.92%
County Website
State
Founded
March 13, 1848
County Seat
2010 Population
426,287
Growth Since 2010
49.83%
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Williamson County, Texas Population Growth

Population by Race

Race Population Percentage
White436,47779.71%
Asian37,3956.83%
Black or African American35,0546.40%
Two or More Races22,9004.18%
Some Other Race13,8452.53%
American Indian and Alaska Native1,5200.28%
Native Hawaiian and Other Pacific Islander4130.08%
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Williamson County, Texas Population by Race

Williamson County, Texas Population Pyramid $2021

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Williamson County, Texas Median Age

36.3


Total

35.5


Male

37


Female

Williamson County, Texas Adults

There are 405,281 adults, (64,740 of whom are seniors) in Williamson County, Texas.

Williamson County, Texas Age Dependency

60.8

Age Dependency Ratio

19

Old Age Dependency Ratio

41.8

Child Dependency Ratio

Williamson County, Texas Sex Ratio

Female

278,055

50.78%

Male

269,549

49.22%

Williamson County, Texas Population by Age

Williamson County, Texas Renter vs Owner Occupied by Household Type

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Williamson County, Texas Household Types

Type Owner Renter
Married82%18%
All68.4%31.6%
Male55.1%44.9%
Non Family50.1%49.9%
Female45.3%54.7%

68.4%

Rate of Home Ownership

Williamson County, Texas Households and Families

Type Count Average Size Owned
All180,1603.0268.4
Married104,9753.5882
Non Family50,2031.3750.1
Female17,6843.9645.3
Male7,2983.9255.1

3.55

Average Family Size

3.02

Average Household Size

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Williamson County, Texas Households by Type

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Education Attained Count Percentage
Less Than 9th Grade11,3633.14%
9th to 12th Grade13,1373.63%
High School Graduate74,26220.51%
Some College82,38522.75%
Associates Degree31,3378.65%
Bachelors Degree99,13427.38%
Graduate Degree50,46013.94%
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Williamson County, Texas Educational Attainment by Sex (over 25)

Williamson County, Texas Educational Attainment by Race

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Race Total High School Bachelors
White231,031223,500101,776
Hispanic75,72562,32619,310
Asian25,36923,49518,039
Black22,73421,3927,387
Other Race9,3357,7642,261
2+ Races9,0378,3873,632
Native American1,058875245
Islander354354174

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 71.11%.

Williamson County, Texas Educational Attainment by Race

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Name Average Male Female
Overall$48,267$57,340$39,054
Less Than 9th Grade$27,742$31,523$18,644
High School Graduate$33,572$39,717$27,352
Some College$43,337$53,404$34,673
Bachelors Degree$60,032$76,867$49,045
Graduate Degree$79,160$100,509$61,449

$48,267

Average Earnings

$57,340

Average Male

$39,054

Average Female

Williamson County, Texas Earnings by Educational Attainment

Williamson County, Texas Language by Age

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Williamson County, Texas Language

78.24% of Williamson County, Texas residents speak only English, while 21.76% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 13.97% of the population.

Williamson County, Texas Language

Williamson County, Texas Poverty by Race

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Name Total In Poverty Poverty Rate
White322,46114,6594.55%
Hispanic132,16513,40010.14%
Black34,4454,14812.04%
Asian37,3411,6874.52%
Multiple22,6761,4996.61%
Other13,5975313.91%
Native1,468815.52%
Islander3928020.41%

6.42%

Overall Poverty Rate

5.82%

Male Poverty Rate

7.00%

Female Poverty Rate

Poverty in Williamson County, Texas

The race most likely to be in poverty in Williamson County, Texas is Islander, with 20.41% below the poverty level.

The race least likely to be in poverty in Williamson County, Texas is Other, with 3.91% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.66%. Among those working part-time, it was 10.33%, and for those that did not work, the poverty rate was 11.01%.

Williamson County, Texas Poverty

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Name Poverty
Less Than 9th Grade14.47%
High School8.40%
Some College4.77%
Bachelors or Greater2.58%

Williamson County, Texas Poverty Rate by Education

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Rate Poverty
Male Unemployed22.60%
Female Unemployed21.12%
Female Employed4.24%
Male Employed3.06%

Williamson County, Texas Poverty Rate by Employment Status and Sex

Williamson County, Texas Income by Household Type

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Name Median Mean
Households$87,337$105,671
Families$100,844$118,126
Married Families$112,563$130,283
Non Families$53,728$68,450
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Income by Household Type

Williamson County, Texas Marital Status

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Marriage Rates

53.3%

Overall Marriage Rate

55.5%

Male Marriage Rate

51.3%

Female Marriage Rate

Williamson County, Texas Married by Age and Sex

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Williamson County, Texas Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Williamson County, Texas Marital Status by Race

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Williamson County, Texas Marital Status

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34,924

Number of Veterans

30,856

Male Veterans

4,068

Female Veterans

War Veterans
First Gulf War10,985
Vietnam10,867
Second Gulf War9,625
Korea1,644
World War II616

Williamson County, Texas Veterans by War

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Age Group Veterans
35 to 5411,718
65 to 747,590
55 to 645,703
75+5,172
18 to 344,741

Williamson County, Texas Veterans by Age

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Name Veterans % of Total
White29,9619.15%
Hispanic5,3175.89%
Black2,84210.93%
2+ Races9658.53%
Other Race5715.18%
Asian3781.38%
Native American11810.25%
Islander8928.16%

Williamson County, Texas Veterans by Race

Williamson County, Texas Veterans by Education

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3.33%

Veteran Poverty Rate

24.52%

Veteran Disability Rate

Williamson County, Texas Veterans by Education

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69.7%

Labor Force Participation

66.2%

Employment Rate

4.8%

Unemployment Rate

Williamson County, Texas Employment by Age

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Williamson County, Texas Employment by Race

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Williamson County, Texas 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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51.65%

Born in Williamson County, Texas

87.40%

Native Born

12.60%

Foreign Born

6.73%

Non Citizen

5.87%

Naturalized

Place of Birth

87.40% of Williamson County, Texas residents were born in the United States, with 51.65% having been born in Texas. 6.73% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Williamson County, Texas 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