How many people live in Geary County, KS?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 35,500 people living in Geary County, KS. That makes Geary County the 14th-most populous county in Kansas. It is home to 1.2% of people living in the state.
35.5K
population of Geary County, KS (2024)
1.2%
County share of the Kansas population (2024)
About 35,500 people lived in Geary County, KS in 2024.
Population estimates, 2000–2024
What are Geary County, KS’s age demographics?
About 3,200 Geary County, KS residents are aged 65 and older in 2024. That represents 9.1% of its population. For comparison, the age group represents 17.9% of Kansas’ population and 18% in the US overall.
Another 11,400 Geary County residents, or 32.1% 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 lower share of Geary County, KS's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Geary County, KS’s racial and ethnic demographics?
Non-Hispanic Black or African American residents make up 15.4% of the Geary County, KS population, higher than the national share of 12.6%. Geary County, KS also has a larger share of people identifying as non-Hispanic two or more races (5.3%) than the US overall (2.5%).
In contrast, Geary County’s non-Hispanic Asian population accounts for 3.1%, below the 6.5% nationwide, and the non-Hispanic white population makes up 55.7% of the county, compared with 57.5% 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.
Geary County, KS has a higher share of a non-Hispanic Black or African American population than Kansas as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Geary County, KS is Junction City with about 22,100 residents in 2024.
Cities and towns in Geary County, KS ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Junction City | 22,053 |
| 2. | Smoky Hill | 8,945 |
| 3. | Grandview Plaza | 1,648 |
| 4. | Milford | 394 |
| 5. | Lyon | 271 |
| 6. | Wingfield | 177 |
| 7. | Liberty | 174 |
| 8. | Blakely | 105 |
| 9. | Jackson | 71 |
| 10. | Balance of Milford | 1,198 |
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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.
