How many people live in Platte County, MO?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 113,200 people living in Platte County, MO. That makes Platte County the 11th-most populous county in Missouri. It is home to 1.8% of people living in the state.
113K
population of Platte County, MO (2024)
1.8%
County share of the Missouri population (2024)
About 113,200 people lived in Platte County, MO in 2024.
Population estimates, 2000–2024
What are Platte County, MO’s age demographics?
About 19,100 Platte County, MO residents are aged 65 and older in 2024. That represents 16.9% of its population. For comparison, the age group represents 18.8% of Missouri’s population and 18% in the US overall.
Another 25,500 Platte County residents, or 22.5% of the population, were children under 18. For comparison, the age group represents 22% of Missouri’s population and 21.6% in the US overall.
A lower share of Platte County, MO's population is aged 18–24 than the US as a whole.
Population estimates by age group, (2024)
What are Platte County, MO’s racial and ethnic demographics?
Non-Hispanic white residents make up 77.2% of the Platte County, MO population, higher than the national share of 57.5%. Platte County, MO also has a larger share of people identifying as non-Hispanic two or more races (2.7%) than the US overall (2.5%).
In contrast, Platte County’s Hispanic population accounts for 7.6%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 8.7% 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.
Platte County, MO has a higher share of a Hispanic population than Missouri as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Platte County, MO is Kansas City with about 55,500 residents in 2024.
Cities and towns in Platte County, MO ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Kansas City (pt.) | 55,477 |
| 2. | Parkville | 8,980 |
| 3. | Platte City | 4,867 |
| 4. | Riverside | 4,498 |
| 5. | Weatherby Lake | 2,125 |
| 6. | Weston | 1,837 |
| 7. | Lake Waukomis | 941 |
| 8. | Ferrelview | 653 |
| 9. | Edgerton | 609 |
| 10. | Dearborn (pt.) | 506 |
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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.
