How many people live in Miller County, MO?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 25,700 people living in Miller County, MO. That makes Miller County the 42nd-most populous county in Missouri. It is home to 0.41% of people living in the state.
25.7K
population of Miller County, MO (2024)
0.41%
County share of the Missouri population (2024)
About 25,700 people lived in Miller County, MO in 2024.
Population estimates, 2000–2024
What are Miller County, MO’s age demographics?
About 5,400 Miller County, MO residents are aged 65 and older in 2024. That represents 20.9% of its population. For comparison, the age group represents 18.8% of Missouri’s population and 18% in the US overall.
Another 6,000 Miller County residents, or 23.3% 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 Miller County, MO's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Miller County, MO’s racial and ethnic demographics?
Non-Hispanic white residents make up 93.5% of the Miller County, MO population, higher than the national share of 57.5%. Miller County, MO also has a larger share of people identifying as non-Hispanic Native Hawaiian and other Pacific Islander (0.22%) than the US overall (0.2%).
In contrast, Miller County’s Hispanic population accounts for 2.4%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.94% 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.
Miller County, MO has a higher share of a non-Hispanic white population than Missouri as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Miller County, MO is Eldon with about 4,700 residents in 2024.
Cities and towns in Miller County, MO ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Eldon | 4,714 |
| 2. | Lake Ozark (pt.) | 2,133 |
| 3. | Iberia | 721 |
| 4. | Osage Beach (pt.) | 426 |
| 5. | St. Elizabeth | 426 |
| 6. | Tuscumbia | 191 |
| 7. | Olean | 121 |
| 8. | Brumley | 75 |
| 9. | Bagnell | 44 |
| 10. | Balance of Miller County | 16,817 |
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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.
