Platte County, MO Property Tax: $3,365/yr (2026)
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The effective property tax rate in Platte County is 1.06% of assessed home value. On a home at the county median value of $317,600, that works out to about $3,367 per year, or $281 per month. Platte County is located in western Missouri, and is home to approximately 108,751 residents.
About Platte County
Platte County covers approximately 419.8 square miles in Missouri. The county is home to about 108,751 residents living in roughly 46,045 housing units, of which 63.0% are owner-occupied. The median household income is $95,748, and the median home was built in 1991.
Platte County borders Atchison County, Leavenworth County, Wyandotte County, Buchanan County, Clay County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Missouri
Property taxes in Missouri are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Missouri offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Platte County Assessor's office to learn which exemptions apply to your property and when to file.
Platte County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Platte County, MO | 1.06% | $317,600 | $3,367 |
| Missouri state average | 0.73% | — | $2,318* |
| Atchison County | 1.31% | $147,900 | $1,941 |
| Leavenworth County | 1.20% | $260,600 | $3,136 |
| Wyandotte County | 1.47% | $152,700 | $2,240 |
| Buchanan County | 0.80% | $156,600 | $1,253 |
| Clay County | 1.10% | $256,400 | $2,817 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Platte County's median home value of $317,600. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Platte County's property tax rate compare to the rest of Missouri?
At 1.06%, Platte County is higher than the Missouri state average of 0.73%. On a home at the county median of $317,600, that means about $3,367 per year — versus $2,318 at the state average rate, a difference of $1,049 per year. Compared to the national average of 1.10%, Platte County is below average.
What's a typical annual property tax bill in Platte County?
For a home at the county median value of $317,600, the annual property tax in Platte County is approximately $3,367 — or about $281 per month. For a home worth $476,400, expect around $5,050 per year. For a $635,200 home, approximately $6,733 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Platte County property tax assessment?
Property assessment appeals in Platte County are handled by the Platte County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Platte County?
Missouri counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 1.06% shown here. Contact the Platte County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File