Platte County, Missouri Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 11th-largest in Missouri
The population of Platte County, Missouri is 108,751 as of the 2023 American Community Survey, making it the 11th-largest county in Missouri. The median household income is $95,748, the median home value is $317,600, and the median age is 38.7.
The population of Platte County has grown 26.2% since 2010 (89,714 → 113,207), a +1.68% annualized rate.
108,751
Population
+1.68%
Annual growth
259
People / sq mi
$95,748
Median Income
$317,600
Median Home Value
Platte County covers 420 sq mi of land at 259.0 people per square mile.
About Platte County, MO
Platte County is defined demographically by education — 45.6% of adults hold a bachelor’s degree, above the national average. With 108,751 residents, Platte County is a county in Missouri. It ranks #11 among counties in Missouri by population.
Earnings sit at the high end: a median household income of $95,748, above the US median of $78,538. Only 4.9% of residents live in poverty, below the national 12.4%. A typical home is worth $317,600, with typical rent around $1,247.
Platte County is among the best-educated US counties: 45.6% of adults 25 and older hold a bachelor’s degree, above the national 35.0%. An unusually large 16.1% of workers are remote, above the national 14.0%, and the average commute runs about 24 minutes each way.
The education numbers are the throughline: a college-heavy population in Platte County usually coincides with higher incomes and a workforce concentrated in professional and information industries.
Platte County Population History (2010-2024)
The county of Platte County had a population of 89,714 in 2010 and 113,207 in 2024, a 26.2% growth over 14 years. The peak was 113,207 in 2024. Average annual growth rate: 1.68%.
113,207
Population (2024)
89,714
Population (2010)
113,207
Peak (2024)
1.68%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 89,714 |
| 2011 | 90,912 |
| 2012 | 92,203 |
| 2013 | 93,435 |
| 2014 | 94,947 |
| 2015 | 96,552 |
| 2016 | 98,771 |
| 2017 | 101,256 |
| 2018 | 102,953 |
| 2019 | 104,726 |
| 2020 | 107,190 |
| 2021 | 108,752 |
| 2022 | 110,593 |
| 2023 | 112,112 |
| 2024 | 113,207 |
Race & Ethnicity
| White | 79.7% |
| Black or African American | 7.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.7% |
| Two or More Races | 0.1% |
Age & Sex
38.7
Median Age
50.4%
Female
49.6%
Male
15.7%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 15.7%
Income & Poverty
| Median household income | $95,748+$26,828 vs state |
| Mean household income | $122,134 |
| Per-capita income | $49,273 |
| Poverty rate | 4.9%-3.5% vs state |
| Unemployment rate | 2.5% |
| Employment-to-population | 66.9% |
Top Industries by Employment
The largest employment sector in Platte County is professional & business services, accounting for 22.7% of workers.
How residents commute
0.2%
Drive alone
0.4%
Carpool
76.2%
Public transit
16.1%
Work from home
24.3 min
Avg commute
Housing
$317,600+$102,000 vs state
Median home value
$1,247
Median rent
67.0%
Homeownership rate
46,045
Total housing units
94.1%
Occupied
5.9%
Vacant
33.0%
Renter-occupied
Social & access
94.1%
With health insurance
97.6%
With broadband internet
44.2%
Foreign-born
8.3%
Veterans (18+)
12.7%
With a disability
91.7%
Speak language other than English at home
Education
96.7%
High School+
45.6%
Bachelor's+
Largest cities in Missouri
Other counties in Missouri
Part of Missouri
Metro areas in Missouri
County rankings
Frequently Asked Questions
Platte County, Missouri has a population of 108,751 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 11th-largest county in Missouri. Population density is 259 people per square mile.
The population of Platte County has grown 26.2% since 2010 (89,714 → 113,207), a +1.68% annualized rate.
The median household income in Platte County, Missouri is $95,748, with mean (average) household income of $122,134 and per-capita income of $49,273. 4.9% of residents live below the federal poverty level.
In Platte County, the largest racial and ethnic groups are White (79.7%), Black or African American (7.6%), 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 Platte County, Missouri is 38.7 years. Residents are 50.4% female and 49.6% male.
The median home value in Platte County is $317,600 and median monthly rent is $1,247. 67.0% of occupied housing units are owner-occupied. The county has 46,045 total housing units, 5.9% of which are vacant.
The largest employment sector in Platte County, Missouri is professional, scientific, and management services, employing 22.7% of workers. The unemployment rate is 2.5%.
Kansas City is among the largest cities associated with Platte County, Missouri, with a population of 508,233.
Platte County, MO Climate
Platte County, MO has an average annual temperature of 12.3°C (54°F) and receives about 975 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12.3°C
Avg Temp
975
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 27° | 27 mm |
| February | 1° / 33° | 31 mm |
| March | 7° / 44° | 64 mm |
| April | 13° / 55° | 89 mm |
| May | 18° / 64° | 130 mm |
| June | 23° / 73° | 122 mm |
| July | 26° / 78° | 107 mm |
| August | 25° / 76° | 96 mm |
| September | 20° / 68° | 123 mm |
| October | 14° / 56° | 85 mm |
| November | 6° / 42° | 61 mm |
| December | 0° / 32° | 40 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 Platte County, MO
The most comfortable months to visit Platte County, MO are typically September, June and August, 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). May is usually the wettest month.
Where to stay near Platte County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.