How many people live in ?

Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 565 people living in McMullen County, TX. That makes McMullen County the 250th-most populous county in Texas. It is home to 0% of people living in the state.

565

population of McMullen County, TX (2024)

0%

County share of the Texas population (2024)

About 565 people lived in McMullen County, TX in 2024.

Population estimates, 2000–2024

What are McMullen County, TX’s age demographics?

About 135 McMullen County residents are aged 65 and older in 2024. That represents 23.9% of its population. For comparison, the age group represents 14% of Texas’s population and 18% in the US overall.
Another 127 McMullen County residents, or 22.5% of the population, were children under 18. For comparison, the age group represents 24.6% of Texas’s population and 21.6% in the US overall.

A higher share of McMullen County, TX's population is aged 65 or older than the US as a whole.

Population estimates by age group, (2024)

What are McMullen County, TX’s racial and ethnic demographics?

Hispanic residents make up 39.1% of the McMullen County, TX population, higher than the national share of 20%.
In contrast, McMullen County’s non-Hispanic Black or African American population accounts for 2.7%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 1.2% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.

McMullen County, TX has a higher share of a non-Hispanic white population than Texas as a whole.

Population estimates by race and ethnicity, (2024)

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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.