Williamson County, TX demographics:
population, income, and more

Total population
672,688
4.5% year-over-year change
Median household income
$111,340/yr
2.8% year-over-year change
Housing units
262,644
4.4% year-over-year change

Williamson County population

How many people live in Williamson County

Williamson County is home to 672,688 residents, according to the most recent Census data. Gender-wise, 49.8% of Williamson County locals are male, and 50.2% are female.

Total population
672,688
4.5% year-over-year change
Gender ratio
Male
49.8%
335,267
Female
50.2%
337,421
Value Percent YoY change
Male 335,267 49.8% 4.7%
Female 337,421 50.2% 4.2%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Williamson County is 37, with the population distributed as follows: about 19.9% are children under 15, then 12% are in the 15 to 24 age group. Adults between 25 and 44 make up 31.5% of the population, while another 23.7% fall into the 45 to 64 bracket. Finally, around 12.9% are 65 or older.

Median age
37.3
Age breakdown
Under 15
19.9%
15 to 24
12%
25 to 44
31.5%
45 to 64
23.7%
Over 65
12.9%
Value Percent YoY change
Under 15 133,651 19.9% 2.8%
15 to 24 80,913 12% 3.7%
25 to 44 211,710 31.5% 6.0%
45 to 64 159,506 23.7% 3.7%
Over 65 86,908 12.9% 5.7%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Williamson County, 81.7% of the population are US-born citizens, while 9.5% have gained naturalized citizenship. At the same time, 8.8% of residents are non-citizens. As for race, 59.6% of locals are Caucasian, 7% are African American and 10% have Asian roots. Another 0.4% are Indigenous American, 0.1% are Pacific Islanders, while 6% identify as another race. There’s also a share of 16.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
81.7%
Non-U.S.-born citizens
9.5%
Non-citizens
8.8%
Value Percent YoY change
U.S.-born citizens 549,745 81.7% 2.7%
Non-U.S.-born citizens 64,039 9.5% 9.7%
Non-citizens 58,904 8.8% 17.3%
Racial breakdown
White
59.6%
Black or African American
7%
American Indian and Alaska Native
0.4%
Asian
10%
Native Hawaiian and other Pacific Islander
0.1%
Two or more races
16.8%
Other
6%
Value Percent
White 400,958 59.6%
Black or African American 46,889 7%
American Indian and Alaska Native 2,935 0.4%
Asian 67,402 10%
Native Hawaiian and other Pacific Islander 791 0.1%
Two or more races 113,287 16.8%
Other 40,426 6%

Households in Williamson County

A peek inside Williamson County households

Williamson County has 252,323 households, with an average of 3 members in each. Of these, 69.9% are families, while the remaining 30.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
252,323
4.4% year-over-year change
Average people per household
3
Non-family households
75,896
Family households
176,427
Value Percent YoY change
Non-family households 75,896 30.1% 5.0%
Family households 176,427 69.9% 4.1%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Williamson County

The housing landscape of Williamson County

Williamson County's housing consists of 262,644 units, with 72.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2.4% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 1.9% of the housing landscape.

Housing units
262,644
4.4% year-over-year change
Housing types
Value Percent
1 unit, detached 190,525 72.5%
1 unit, attached 6,261 2.4%
2 units 4,906 1.9%
3 or 4 units 5,291 2%
5 to 9 units 8,129 3.1%
10 to 19 units 14,792 5.6%
20 to 49 units 11,169 4.2%
50 or more units 16,349 6.2%
Mobile home 4,951 1.9%
Boat, RV, van, etc. 271 0.1%
Homes built since 2020
25,579
70.7% year-over-year change

The age of buildings in Williamson County

In Williamson County, the median construction year is 2006. About 1.3% of homes were built before the 1940s, with another 0.5% going up by 1949. Most development happened in the second half of the 20th century. Then, 24.9% of homes were added from 2000 to 2009, 29.7% between 2010 and 2019, and 9.7% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 3,374 1.3% 1.7%
Built between 1940 and 1949 1,291 0.5% 2.8%
Built between 1950 and 1959 1,703 0.6% -17.1%
Built between 1960 and 1969 3,293 1.2% 14.0%
Built between 1970 and 1979 14,907 5.7% 0.2%
Built between 1980 and 1989 29,126 11.1% -1.8%
Built between 1990 and 1999 40,012 15.2% -3.3%
Built between 2000 and 2009 65,394 24.9% 0.5%
Built between 2010 and 2019 77,965 29.7% 2.5%
Built in 2020 or later 25,579 9.7% 70.7%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Williamson County occupancy rates

Out of the 252,323 occupied housing units in Williamson County, 66.4% are owner-occupied, while 33.6% are lived in by tenants. Meanwhile, 3.9% of all homes on the local market sit vacant.

Occupied housing units
252,323
4.4% year-over-year change
Occupancy breakdown
Renter occupied
84,783
Owner occupied
167,540
Value Percent YoY
change
Renter occupied 84,783 33.6% 6.5%
Owner occupied 167,540 66.4% 3.3%
Unoccupied housing units
3.9%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Williamson County housing costs

Housing costs in Williamson County come to a median of $1,914 per month, while tenants specifically pay a median gross rent of $1,796.

Median housing costs per month
$1,914/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Williamson County
$1,796/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Williamson County

Williamson County education at a glance

About 23.8% of the population in Williamson County went to high school, while 20.7% pursued college studies. Another 7.9% earned an associate degree and 28.9% hold a bachelor’s. Meanwhile, 16% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 13,626 2.7% 10.6%
High school diploma 121,655 23.8% 4.8%
College diploma 105,849 20.7% 0.9%
Associate degree 40,164 7.9% 1.5%
Bachelor's degree 147,544 28.9% 5.8%
Graduate degree 81,904 16% 10.7%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Williamson County

How much people earn in Williamson County

The average annual household income in Williamson County was $140,407 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4.2% change from the previous year. At the same time, the median income stood at $111,340, reflecting a +2.8% shift over the same period.

Average household income in Williamson County
$140,407/year
4.2% year-over-year change
Median household income in Williamson County
$111,340/year
2.8% year-over-year change

Williamson County income by age

In Williamson County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $125,729. Those with someone between 45 and 64 in charge, often well established professionally, earn $128,070 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $58,884, while those led by someone over 65, many of whom may be retired, have about $75,134 in earnings. Overall, 93.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $58,884 4.7%
25 - 44 $125,729 4.1%
45 - 64 $128,070 2.5%
Over 65 $75,134 1.0%
Above poverty level
618,219
Below poverty level
42,494
Value Percent YoY
change
Above poverty level 618,219 93.6% 4.4%
Below poverty level 42,494 6.4% 5.9%

Employment in Williamson County

Workforce and job types in Williamson County

The job market in Williamson County is powered by 358,316 working residents, spread across a range of industries and roles. 85.5% of the working population are employed in professional or administrative positions, while 14.5% are in hands-on or service-based jobs. Also, 9.6% run their own businesses, 70.1% are employed by private companies, and 13.9% work in the public sector.

Workforce demographics

Working population
358,316
4.8% year-over-year change
White collar
306,519
Blue collar
51,797
Value Percent YoY change
White collar 306,519 85.5% 5.0%
Blue collar 51,797 14.5% 4.0%
Employer type
Self employees
9.6%
Private companies
70.1%
Governmental workers
13.9%
Not for profit companies
6.4%
Value Percent YoY change
Self employees 34,475 9.6% 9.9%
Private companies 251,227 70.1% 4.6%
Governmental workers 49,679 13.9% 3.2%
Not for profit companies 22,935 6.4% 4.0%
Unemployment rate
3.9%
1.6% year-over-year change

Available workforce

The unemployment rate in Williamson County stands at 3.9%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Williamson County

How people get around in Williamson County

In Williamson County, the average commute time is 28 minutes. Commuting methods vary: 71.6% of residents travel by personal vehicle and 0.8% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
28 min
0.0% year-over-year change
Means of transportation
Value Percent YoY change
Car 253,932 71.6% 2.1%
Taxicab 801 0.2% 87.6%
Bus or trolleybus 517 0.2% -24.9%
Subway or elevated 104 0% N/A
Railroad 209 0.1% -37.8%
Ferryboat 33 0% -19.5%
Motorcycle 594 0.2% -27.9%
Bicycle 585 0.2% 11.8%
Walk 2,880 0.8% -18.6%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Williamson County by zipcode?

Zipcode Population Number of households Median income Average income
76527 4,918 1,582 $81,574 $94,245
76530 2,598 959 $106,250 $117,292
76537 16,272 5,448 $98,199 $106,499
76574 20,242 7,752 $78,568 $98,028
76578 1,762 571 $105,063 $105,101
78613 89,956 33,919 $125,487 $150,501
78615 1,637 549 $80,938 $100,434
78621 30,411 10,175 $98,534 $115,303
76511 2,702 920 $69,286 $94,213

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FAQs about Williamson County demographics 

What is the total population of Williamson County?

Williamson County has a total population of 672,688 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +4.5% compared to a year ago.

What is the gender ratio in Williamson County?

The gender ratio in Williamson County is as follows:
  • 49.8% males (335,267 residents)
  • 50.2% females (337,421 residents)

What is the median age in Williamson County?

The median age in Williamson County is 37.3.

What is the age distribution of the population in Williamson County?

The age distribution in Williamson County is as follows:
  • Under 15: 19.9% (133,651 residents)
  • Ages 15-24: 12% (80,913 residents)
  • Ages 25-44: 31.5% (211,710 residents)
  • Ages 45-64: 23.7% (159,506 residents)
  • Over 65: 12.9% (86,908 residents)

What is the racial and ethnic makeup of Williamson County?

The racial and ethnic makeup of Williamson County is as follows:
  • White: 59.6% (400,958 residents)
  • Black or African American: 7% (46,889 residents)
  • American Indian and Alaska Native: 0.4% (2,935 residents)
  • Asian: 10% (67,402 residents)
  • Native Hawaiian and Other Pacific Islander: 0.1% (791 residents)
  • Two or More Races: 16.8% (113,287 residents)
  • Other: 6% (40,426 residents)

What percentage of the population in Williamson County are U.S.-born citizens?

U.S.-born citizens represent 81.7% of the population in Williamson County.

How many housing units are there in Williamson County?

There are 262,644 housing units in Williamson County, reflecting a +4.4% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Williamson County and what is the average household size?

Williamson County has a total of 252,323 households, with an average of 3 people in each.

What is the median household income in Williamson County?

Williamson County has a median household income of $111,340, representing a +2.8% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Williamson County?

The employment rate is 96.1% in Williamson County, with a workforce of 358,316 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 85.5% (306,519 residents)
  • Blue-collar workers: 14.5% (51,797 residents)

Places of employment:
  • Self-employed: 9.6% (34,475 residents)
  • Private companies: 70.1% (251,227 residents)
  • Governmental workers: 13.9% (49,679 residents)
  • Not-for-profit companies: 6.4% (22,935 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025