Williamson County Population 2017

Williamson County's estimated population is 528,718 with a growth rate of 4.07% in the past year according to the most recent United States census data. Williamson County is the 12th largest county in Texas.

Year Population Growth Growth Rate
2016528,71820,6594.07%
2015508,05918,9163.87%
2014489,14318,3213.89%
2013470,82214,4703.17%
2012456,35214,0743.18%
2011442,27815,8633.72%
2010426,415286,864205.56%
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%

Williamson County Population Growth

Population Data via

Williamson County Race Data

Race Population Percentage
White423,00580.01%
Black or African American34,2966.49%
Asian32,0296.06%
Two or More Races13,5072.55%
American Indian and Alaska Native4,4770.85%
Native Hawaiian and Other Pacific Islander7450.14%

Williamson County Population Pyramid

0k5k10k15k20kWilliamson County Male Population0k5k10k15k20kWilliamson County Female Population

Population of Cities in Williamson County

City 2010 Census 2016 Estimated Growth Growth Rate
Austin81104594789013684516.87%
Round Rock1000011208922089120.89%
Cedar Park51731689181718733.22%
Georgetown47466671401967441.45%
Leander26452427611630961.66%
Hutto1646123832737144.78%
Taylor1528116857157610.31%
Liberty Hill927161268573.89%
Granger14171514976.85%
Jarrell994134635235.41%
Florence113712491129.85%
Thrall8389289010.74%
Weir4535004710.38%
Coupland277302259.03%
Data Sources
  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