Montgomery County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 79th-largest in Missouri
The population of Montgomery County, Missouri is 11,422 as of the 2023 American Community Survey, making it the 79th-largest county in Missouri. The median household income is $61,042, the median home value is $171,300, and the median age is 43.8.
The population of Montgomery County has declined 5.7% since 2010 (12,209 → 11,511), a -0.42% annualized rate.
11,422
Population
-0.42%
Annual growth
21
People / sq mi
$61,042
Median Income
$171,300
Median Home Value
Montgomery County covers 535 sq mi of land at 21.3 people per square mile.
About Montgomery County, MO
Montgomery County is a county in Missouri with a population of 11,422. It ranks #79 among counties in Missouri by population. The median age is 43.8, older than the national median. The population is 50.6% male and 49.4% female.
The median household income in Montgomery County is $61,042, below the US median of $74,580. 9.9% of residents live below the federal poverty level. Home values sit at a median of $171,300, with monthly rent averaging $767. The homeownership rate of 73.3% is higher than the national rate of 64.8%.
Educational attainment in Montgomery County reflects 16.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 7.9% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 28.1 minutes each way.
Montgomery County Population History (2010-2024)
The county of Montgomery County had a population of 12,209 in 2010 and 11,511 in 2024, a -5.7% growth over 14 years. The peak was 12,209 in 2010. Average annual growth rate: -0.42%.
11,511
Population (2024)
12,209
Population (2010)
12,209
Peak (2010)
-0.42%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 12,209 |
| 2011 | 12,206 |
| 2012 | 11,971 |
| 2013 | 11,852 |
| 2014 | 11,725 |
| 2015 | 11,579 |
| 2016 | 11,459 |
| 2017 | 11,388 |
| 2018 | 11,458 |
| 2019 | 11,472 |
| 2020 | 11,286 |
| 2021 | 11,440 |
| 2022 | 11,463 |
| 2023 | 11,430 |
| 2024 | 11,511 |
Race & Ethnicity
| White | 93.3% |
| Black or African American | 1.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.0% |
Age & Sex
43.8
Median Age
49.4%
Female
50.6%
Male
20.4%
Age 65+
Age Distribution
Children (under 15): 18.2% · Seniors (65+): 20.4%
Income & Poverty
| Median household income | $61,042$-7,878 vs state |
| Mean household income | $73,885 |
| Per-capita income | $29,876 |
| Poverty rate | 9.9%+1.5% vs state |
| Unemployment rate | 1.6% |
| Employment-to-population | 55.6% |
Top Industries by Employment
The largest employment sector in Montgomery County is professional & business services, accounting for 19.3% of workers.
How residents commute
0.0%
Drive alone
2.9%
Carpool
77.0%
Public transit
7.9%
Work from home
28.1 min
Avg commute
Housing
$171,300$-44,300 vs state
Median home value
$767
Median rent
73.3%
Homeownership rate
5,797
Total housing units
79.2%
Occupied
20.8%
Vacant
26.7%
Renter-occupied
Social & access
90.0%
With health insurance
89.5%
With broadband internet
17.9%
Foreign-born
10.4%
Veterans (18+)
18.2%
With a disability
98.0%
Speak language other than English at home
Education
88.5%
High School+
16.5%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Montgomery County, Missouri has a population of 11,422 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 79th-largest county in Missouri. Population density is 21 people per square mile.
The population of Montgomery County has declined 5.7% since 2010 (12,209 → 11,511), a -0.42% annualized rate.
The median household income in Montgomery County, Missouri is $61,042, with mean (average) household income of $73,885 and per-capita income of $29,876. 9.9% of residents live below the federal poverty level.
In Montgomery County, the largest racial and ethnic groups are White (93.3%), Hispanic or Latino (2.0%), Black or African American (1.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Montgomery County, Missouri is 43.8 years. Residents are 49.4% female and 50.6% male.
The median home value in Montgomery County is $171,300 and median monthly rent is $767. 73.3% of occupied housing units are owner-occupied. The county has 5,797 total housing units, 20.8% of which are vacant.
The largest employment sector in Montgomery County, Missouri is professional, scientific, and management services, employing 19.3% of workers. The unemployment rate is 1.6%.
Kansas City is among the largest cities associated with Montgomery County, Missouri, with a population of 508,233.
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Full rankings of Missouri counties
Statewide data for Missouri
Population, race, income, age, and trends across Missouri
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.