How many people live in ?

Updated annually
In 2025, there were 6.27 million people living in Missouri. That makes Missouri the 18th-most populous state, home to 1.8% of people living in the US.

6.27M

population of Missouri (2025)

1.8%

Missouri share of the US population (2025)
The population of Missouri was about 2.0 times higher than it was in 1900. Between 2024 and 2025, the population of Missouri grew by about 27,000 people.

About 6.27 million people lived in Missouri in 2025. That's about 2.0 times more than in 1900.

Annual population estimates

What are Missouri's age demographics?

About 1.17 million Missouri residents were aged 65 and older in 2024. That represents 18.8% of the state’s population compared with 18% in the US overall.
Another 1.37 million Missouri residents, or 22% of the state’s population, were aged under 18. For comparison, children account for 21.6% of the US population.

A higher share of Missouri's population is 65 and older than the US overall.

Population share by age group (2024)

What are Missouri's racial and ethnic demographics?

A state’s population may have racial and ethnic differences compared with the US overall. These figures reflect how people identified their race alone (not in combination with other races), and separate Hispanic or Latino ethnicity, following Census Bureau reporting standards.
Non-Hispanic white residents make up 77.4% of Missouri’s population, higher than the national share of 57.5%. Missouri also has a larger share of people identifying as non-Hispanic two or more races (2.5%) than the US overall (2.5%).
In contrast, Missouri’s Hispanic population accounted for 5.6%, below the 20% share nationwide. The non-Hispanic Asian population makes up 2.5% of the state, compared with 6.5% nationally.

A higher share of Missouri's population is non-Hispanic white than the US overall.

Population share by race and ethnicity (2024)

What are Missouri's most populous counties?

In 2024, seven out of 115 counties accounted for over half of Missouri’s population:
  • St. Louis County, 992,900 (15.9% of the population)
  • Jackson County, 727,400 (11.6%)
  • St. Charles County, 423,700 (6.8%)
  • Greene County, 307,900 (4.9%)
  • St. Louis city, 279,700 (4.5%)
  • Clay County, 263,400 (4.2%)
  • Jefferson County, 231,900 (3.7%)

In 2024, St. Louis County was the most populous county in Missouri.

Population estimates

What are Missouri's most populous cities?

The largest city in Missouri is Kansas City with about 516,000 residents in 2024.

Cities and counties in Missouri ranked by population

Cities and counties in Missouri ranked by population
1.

Kansas City

516,032
2.

St. Louis

279,695
3.

Springfield 

170,596
4.

Columbia 

130,900
5.

Independence 

121,629
6.

Lee's Summit

106,419
7.

O'Fallon 

95,355
8.

St. Charles

72,458
9.

St. Joseph

71,098
10.

St. Peters

61,398

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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.