Platte County, Missouri Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Platte County, MO Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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B
Health Around averageAmong the top 3 healthiest counties in Missouri
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B
Income Around averageAmong the top 3 wealthiest counties in Missouri
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A
Education Above averageAmong the top 3 best educated counties in Missouri
Source: Map AI Methodology
Population: density and quick facts
| Metric | Platte County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Population | 110,371 | 6,186,340 | 337,468,954 |
| Population density (per sq mi) | 258.9 | 88.8 | 86.4 |
| Population growth (%/yr) | 1.90% | 0.28% | 0.59% |
| Median age | 37.7 | 37.5 | 37.3 |
| Households | 43,902 | 2,507,647 | 130,235,071 |
Population in Platte County grew by 26.2% from 2009 to 2024, reaching 110,371 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Platte County is Millennials, aged 29–44, at 22.8% of residents. That is 1.5 points above Missouri as a whole.
- Gen Z 13–28 22,734 20.6% -0.6 pts
- Millennials 29–44 25,177 22.8% +1.5 pts
- Gen X 45–60 23,791 21.6% +1.9 pts
- Boomers 61–79 16,582 15.0% -2.9 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Missouri, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 49.9% of the people living in Platte County and men 50.1%.
- Women 49.9% Missouri 50.7%
- Men 50.1% Missouri 49.3%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Platte County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Platte County has a the economy index of B, which means it is quite prosperous.
| Metric | Platte County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Median household income | $96,388 | $70,801 | $80,455 |
| Income growth (%/yr) | 3.75% | 4.56% | 4.80% |
| Unemployment rate | 2.7% | 4.0% | 5.2% |
The median household income in Platte County is about 36% higher than in Missouri.
Housing
| Metric | Platte County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Median home price | $67,499 | $145,462 | $248,835 |
| Median rent | $1,334 | $1,033 | $1,407 |
| Homeownership rate | 67.4% | 68.1% | 65.2% |
The median home price in Platte County is about 4.2 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,334 per month for that long.
Commute Time & Mobility
Commuters in Platte County spend about 44 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 184 hours, about 7.7 full days, spent commuting.
| Metric | Platte County | Missouri Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 22.1 | 21.0 | 22.4 |
| Round-trip commute (min) | 44.3 | 41.9 | 44.8 |
| Yearly time spent (hours) | 184 | 175 | 187 |
| Estimated yearly cost | $5,717 | $5,415 | $5,790 |
| Work from home | 19.2% | 13.0% | 15.0% |
| Highway traffic (vehicles/day) | 7,467 | 7,545 | 8,813 |
| Local road traffic (vehicles/day) | 1,481 | 923 | 1,355 |
Fastest commutes among counties in
Missouri:
Saline County (11.9 min), Adair County (12.0 min), Nodaway County (12.1 min).
Slowest:
Bollinger County (33.1 min), Ray County (32.2 min), Maries County (31.9 min).
The average commute time in Platte County is 22 minutes, longer than the 21 minutes in Missouri.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Platte County has a education index of A, which means it is very educated.
| Metric | Platte County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 41.1% | 28.8% | 31.6% |
| Average household size | 2.49 | 2.40 | 2.53 |
Highest education index among counties in
Missouri:
St. Louis County (0.4), Platte County (0.4), Boone County (0.4).
Lowest:
Bollinger County (0.2), Wayne County (0.2), Ripley County (0.2).
Health
Platte County has a health index of B, which means it is quite healthy.
| Metric | Platte County | Missouri Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.7 | 76.9 | 78.3 |
| Self-rated poor health | 11.6% | 19.0% | 16.3% |
| Smokers | 15.5% | 22.8% | 19.0% |
Highest health index among counties in
Missouri:
St. Charles County (0.8), Platte County (0.8), Boone County (0.8).
Lowest:
Scotland County (0.7), Ripley County (0.7), Pemiscot County (0.8).
Platte County, MO Compared With Nearby Counties
Platte County, MO is the 3rd largest of the 6 counties compared here, 110,371 residents against a local median of 83,567. Platte County, MO's median home price, at $67,499, runs 52% below the $140,630 typical of the counties around it.
Median household income tells the same story from another angle: $96,388 against a local median of $71,052, 36% above it. The one measure here that carries a verdict is median household income, and at 36% above the local median it puts Platte County, MO at the better end of the local range. The counties themselves spread $156,945 on median home price, so Platte County, MO sits at one end of an already wide local range rather than apart from it. Platte County, MO has the 5th highest median home price of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Platte County, MO | 110,371 | $96,388 #1/6 | $67,499 #5/6 | 22.1 min #5/6 |
| Wyandotte County, KS | 167,620 | $64,473 | $140,630 | 21.2 min |
| Buchanan County, MO | 83,567 | $61,673 | $175,212 | 13.8 min |
| Leavenworth County, KS | 83,123 | $88,191 | $88,571 | 22.1 min |
| Clay County, MO | 258,122 | $87,903 | $218,653 | 21.0 min |
| Clinton County, MO | 21,414 | $71,052 | $61,709 | 27.2 min |
Frequently Asked Questions
Common questions about Platte County, Missouri.
How big is Platte County, Missouri by population?
About 110,371 people live in Platte County, Missouri, in 43,902 households of 2.5 people on average. The median age is 37.7, close to the U.S. median of 37.3.
Is Platte County, Missouri mostly urban or rural?
Averaged over its land area, Platte County, Missouri has 259 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 3.0 times the U.S. average of 86.
Is Platte County, Missouri an affordable place to live?
The median home costs 0.7 times the median household income ($67,499 against $96,388), compared with 3.1 times nationally. That is within the traditional rule of thumb of about 3 times income. Median rent of $1,334 a month takes about 17% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Platte County, Missouri?
Unemployment in Platte County, Missouri is only 2.7%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How educated are people in Platte County, Missouri?
41.1% of adults in Platte County, Missouri hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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