Population

Is population growing or shrinking?

Updated annually
It grew by 25,800 between 2023 and 2024, the 22nd-most among all counties in the US. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. Williamson County, TX’s 3.7% annual increase was primarily driven by people moving from other states.
In the decade between 2014 and 2024, Williamson County, TX’s population grew by 48.9%.

+25.8K

population change (2023 to 2024)

+3.7%

percent change in population (2023 to 2024)
Since 2000, Williamson County, TX's population increased 24 out of 24 years. The largest increase occurred between 2021 and 2022, when Williamson County, TX gained 29,200 residents. Its smallest increase occurred between 2002 and 2003 when there were 12,700 more residents.

Williamson County, TX gained 25,800 residents between 2023 and 2024.

Annual population change

A county’s population is influenced by three factors:
  • Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2023 and 2024 natural population change was positive in Williamson County, TX, with births exceeding deaths by 4,200.
  • Immigration: international migration directly into or out of a county: If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Between 2023 to 2024, Williamson County, TX’s population change from immigration was positive with about 6,700 more people coming from another country directly to Williamson County, TX than leaving.
  • Domestic migration, moving between counties: Between 2023 to 2024, Williamson County, TX’s population change from domestic migration was positive with about 15,000 more people coming from any other county in the US.

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Between 2023 and 2024, domestic migration was the primary driver of population growth in Williamson County, TX.

Components of population change

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Methodology

USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.

The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.

Page sources

USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.