Cass County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 10th-largest in Missouri
The population of Cass County, Missouri is 109,393 as of the 2023 American Community Survey, making it the 10th-largest county in Missouri. The median household income is $87,413, the median home value is $269,000, and the median age is 40.1.
The population of Cass County has grown 14.2% since 2010 (99,756 → 113,873), a +0.95% annualized rate.
109,393
Population
+0.95%
Annual growth
157
People / sq mi
$87,413
Median Income
$269,000
Median Home Value
Cass County covers 697 sq mi of land at 157.0 people per square mile.
About Cass County, MO
Among US counties, Cass County stands out first on household income: a median of $87,413, above the US median of $78,538. Cass County is a county in Missouri with a population of 109,393. It is the #10-largest of all counties in Missouri nationally.
Households here are among the highest-earning of all US counties: median income is $87,413, above the US median of $78,538. Poverty is relatively low for US counties at 4.7%, below the national 12.4%. Home values run above average at $269,000, with typical rent around $1,147.
Educational attainment is on the higher side for US counties — 28.8% of adults hold a four-year degree, below the national 35.0%. Remote work is on the higher side at 12.3%, below the national 14.0%, and the average commute runs about 29 minutes each way.
Taken together, the income and housing figures place Cass County firmly in the higher-cost, higher-earning tier of US counties — a profile that tends to track dense job markets and competitive housing.
Cass County Population History (2010-2024)
The county of Cass County had a population of 99,756 in 2010 and 113,873 in 2024, a 14.2% growth over 14 years. The peak was 113,873 in 2024. Average annual growth rate: 0.95%.
113,873
Population (2024)
99,756
Population (2010)
113,873
Peak (2024)
0.95%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 99,756 |
| 2011 | 100,017 |
| 2012 | 100,458 |
| 2013 | 100,712 |
| 2014 | 100,872 |
| 2015 | 101,389 |
| 2016 | 102,645 |
| 2017 | 103,502 |
| 2018 | 104,753 |
| 2019 | 105,731 |
| 2020 | 108,162 |
| 2021 | 109,792 |
| 2022 | 110,345 |
| 2023 | 111,695 |
| 2024 | 113,873 |
Race & Ethnicity
| White | 85.6% |
| Black or African American | 4.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.0% |
Age & Sex
40.1
Median Age
50.9%
Female
49.1%
Male
17.5%
Age 65+
Age Distribution
Children (under 15): 19.4% · Seniors (65+): 17.5%
Income & Poverty
| Median household income | $87,413+$18,493 vs state |
| Mean household income | $105,071 |
| Per-capita income | $41,075 |
| Poverty rate | 4.7%-3.7% vs state |
| Unemployment rate | 3.1% |
| Employment-to-population | 63.8% |
Top Industries by Employment
The largest employment sector in Cass County is professional & business services, accounting for 20.9% of workers.
How residents commute
0.0%
Drive alone
0.9%
Carpool
78.9%
Public transit
12.3%
Work from home
28.8 min
Avg commute
Housing
$269,000+$53,400 vs state
Median home value
$1,147
Median rent
75.9%
Homeownership rate
44,928
Total housing units
94.2%
Occupied
5.8%
Vacant
24.1%
Renter-occupied
Social & access
92.2%
With health insurance
95.7%
With broadband internet
35.7%
Foreign-born
8.5%
Veterans (18+)
13.4%
With a disability
96.7%
Speak language other than English at home
Education
93.7%
High School+
28.8%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Cass County, Missouri has a population of 109,393 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 10th-largest county in Missouri. Population density is 157 people per square mile.
The population of Cass County has grown 14.2% since 2010 (99,756 → 113,873), a +0.95% annualized rate.
The median household income in Cass County, Missouri is $87,413, with mean (average) household income of $105,071 and per-capita income of $41,075. 4.7% of residents live below the federal poverty level.
In Cass County, the largest racial and ethnic groups are White (85.6%), Black or African American (4.5%), Hispanic or Latino (1.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Cass County, Missouri is 40.1 years. Residents are 50.9% female and 49.1% male.
The median home value in Cass County is $269,000 and median monthly rent is $1,147. 75.9% of occupied housing units are owner-occupied. The county has 44,928 total housing units, 5.8% of which are vacant.
The largest employment sector in Cass County, Missouri is professional, scientific, and management services, employing 20.9% of workers. The unemployment rate is 3.1%.
Kansas City is among the largest cities associated with Cass County, Missouri, with a population of 508,233.
Cass County, MO Climate
Cass County, MO has an average annual temperature of 12.6°C (55°F) and receives about 1008 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.6°C
Avg Temp
1008
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 28° | 34 mm |
| February | 1° / 34° | 34 mm |
| March | 7° / 44° | 77 mm |
| April | 13° / 55° | 92 mm |
| May | 18° / 64° | 122 mm |
| June | 23° / 73° | 135 mm |
| July | 26° / 78° | 92 mm |
| August | 25° / 77° | 97 mm |
| September | 20° / 69° | 121 mm |
| October | 14° / 57° | 96 mm |
| November | 7° / 44° | 65 mm |
| December | 0° / 33° | 43 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Cass County, MO
The most comfortable months to visit Cass County, MO are typically September, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near -8°C low). June is usually the wettest month.
Where to stay near Cass County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.