How many people live in Thomas County, KS?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 7,800 people living in Thomas County, KS. That makes Thomas County the 49th-most populous county in Kansas. It is home to 0.26% of people living in the state.
7.8K
population of Thomas County, KS (2024)
0.26%
County share of the Kansas population (2024)
About 7,800 people lived in Thomas County, KS in 2024.
Population estimates, 2000–2024
What are Thomas County, KS’s age demographics?
About 1,500 Thomas County, KS residents are aged 65 and older in 2024. That represents 19.3% of its population. For comparison, the age group represents 17.9% of Kansas’s population and 18% in the US overall.
Another 1,900 Thomas County residents, or 24% of the population, were children under 18. For comparison, the age group represents 23.5% of Kansas’s population and 21.6% in the US overall.
A higher share of Thomas County, KS's population is aged 18–24 than the US as a whole.
Population estimates by age group, (2024)
What are Thomas County, KS’s racial and ethnic demographics?
Non-Hispanic white residents make up 86.8% of the Thomas County, KS population, higher than the national share of 57.5%.
In contrast, Thomas County’s non-Hispanic Black or African American population accounts for 1.1%, below the 12.6% nationwide, and the Hispanic population makes up 9.2% of the county, compared with 20% 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.
Thomas County, KS has a higher share of a non-Hispanic white population than Kansas as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Thomas County, KS is Colby with about 5,500 residents in 2024.
Cities and towns in Thomas County, KS ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Colby | 5,539 |
| 2. | Morgan | 543 |
| 3. | Brewster | 282 |
| 4. | Rexford | 197 |
| 5. | Summers | 166 |
| 6. | Rovohl | 123 |
| 7. | East Hale | 116 |
| 8. | Barrett | 113 |
| 9. | Gem | 95 |
| 10. | Kingery | 91 |
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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.
