How many people live in Pettis County, MO?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 43,800 people living in Pettis County, MO. That makes Pettis County the 26th-most populous county in Missouri. It is home to 0.7% of people living in the state.
43.8K
population of Pettis County, MO (2024)
0.7%
County share of the Missouri population (2024)
About 43,800 people lived in Pettis County, MO in 2024.
Population estimates, 2000–2024
What are Pettis County, MO’s age demographics?
About 8,000 Pettis County residents are aged 65 and older in 2024. That represents 18.2% of its population. For comparison, the age group represents 18.8% of Missouri’s population and 18% in the US overall.
Another 10,800 Pettis County residents, or 24.7% 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 higher share of Pettis County, MO's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Pettis County, MO’s racial and ethnic demographics?
Non-Hispanic white residents make up 81.9% of the Pettis County, MO population, higher than the national share of 57.5%. Pettis County, MO also has a larger share of people identifying as non-Hispanic two or more races (2.8%) than the US overall (2.5%).
In contrast, Pettis County’s non-Hispanic Black or African American population accounts for 3.1%, below the 12.6% nationwide, and the Hispanic population makes up 10.6% 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.
Pettis 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 Pettis County, MO is Sedalia with about 22,300 residents in 2024.
Cities and towns in Pettis County, MO ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Sedalia | 22,310 |
| 2. | La Monte | 1,009 |
| 3. | Green Ridge | 599 |
| 4. | Smithton | 504 |
| 5. | Houstonia | 195 |
| 6. | Hughesville | 152 |
| 7. | Windsor (pt.) | 110 |
| 8. | Ionia (pt.) | |
| 9. | Balance of Pettis County | 18,912 |
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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.
