How many people live in Castro County, TX?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 7,400 people living in Castro County, TX. That makes Castro County the 183rd-most populous county in Texas. It is home to 0.02% of people living in the state.
7.38K
population of Castro County, TX (2024)
0.02%
County share of the Texas population (2024)
About 7,400 people lived in Castro County, TX in 2024.
Population estimates, 2000–2024
What are Castro County, TX’s age demographics?
About 1,300 Castro County, TX residents are aged 65 and older in 2024. That represents 17.6% of its population. For comparison, the age group represents 14% of Texas' population and 18% in the US overall.
Another 2,100 Castro County, TX residents, or 28.5% 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 Castro County, TX's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Castro County, TX’s racial and ethnic demographics?
Hispanic residents make up 65.9% of the Castro County, TX population, higher than the national share of 20%.
In contrast, Castro County’s non-Hispanic white population accounts for 29.5%, below the 57.5% nationwide, and the non-Hispanic Black or African American population makes up 1.9% of the county, compared with 12.6% 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.
Castro County, TX has a higher share of a Hispanic population than Texas as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Castro County, TX is Dimmitt with about 4,100 residents in 2024.
Cities and towns in Castro County, TX ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Dimmitt | 4,119 |
| 2. | Hart | 881 |
| 3. | Nazareth | 310 |
| 4. | Balance of Castro County | 2,070 |
Keep exploring
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.
