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Updated 2025 Tax Year

Park County
Property Tax Guide

Everything you need to know about property taxes in Park County, WY. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
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Quick Facts
Tax Rate
Varies by location within Park County due to special districts (county base + school + fire + special districts)
1st Due
Nov 10
2nd Due
May 10
Exemptions
4+ Available
Section 1

How Property Tax Works

Park County, Wyoming operates under a property tax system that funds essential local services including schools, county operations, fire protection, and various special districts. Property taxes are assessed annually based on fair market value, with residential properties subject to a 9.5% assessment rate for the 2025 tax year. The county applies Wyoming's statewide assessment methodology, where properties are valued at fair market value and then assessed at the statutory rate.

Your actual property tax rate depends on your specific location within Park County, as different areas are served by various special taxing districts including school districts, fire districts, and other local improvement districts. The total mill levy combines the county's base rate with these additional district assessments, typically resulting in effective tax rates that vary by location. Park County offers several tax credits and exemptions that can significantly reduce your tax burden, but most require annual application and are not automatically applied to your assessment.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County GeneralVariableBasic county operations and services
School DistrictsVariableLocal school district funding
Fire DistrictsVariableFire protection services by district
Library DistrictsVariablePublic library system funding
Weed & PestVariableCounty weed and pest control
Fair BoardVariableCounty fair operations
Total Mill Levy71.7 mills (avg)Combined rate for FY 2025-2026

Note: The 71.7 mill average levy rate applies to the assessed value (9.5% of market value for residential properties). Actual rates vary significantly by location within Park County depending on which special taxing districts serve your property. Contact the Park County Assessor's Office for your specific district combination and exact mill levy.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Park County, property taxes are due in two installments:

First Installment
Nov 10
Delinquent after Dec 10
Second Installment
May 10
Delinquent after Apr 10
Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Park County are triggered when there are changes in property ownership, new construction, or improvements that increase a property's assessed value during the tax year. When these events occur after the annual assessment roll has been completed, the county issues a supplemental tax bill to capture the additional tax liability for the portion of the year the higher value was in effect.

For example, if you purchase a newly constructed home in Park County in January that wasn't on the previous year's tax roll, you would receive a supplemental tax bill covering the period from January through the end of the fiscal year. The supplemental tax is calculated by applying the current year's tax rate to the difference between the new assessed value and any previous assessed value, prorated for the months the change was in effect. These supplemental bills are typically issued within 60 days of the assessment change and follow the same payment schedule as regular property taxes.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value (9.5%): $28,500
  • Less: 25% Homeowner Exemption: -$7,125
  • Net Taxable Value: $21,375
  • Annual Tax (71.7 mills): $1,532
  • Monthly Payment: $128

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value (9.5%): $57,000
  • Less: 25% Homeowner Exemption: -$14,250
  • Net Taxable Value: $42,750
  • Annual Tax (71.7 mills): $3,065
  • Monthly Payment: $255

Example 3: $1,000,000 Home (Senior Homeowner)

  • Market Value: $1,000,000
  • Assessed Value (9.5%): $95,000
  • Less: 50% Senior Exemption (65+): -$47,500
  • Net Taxable Value: $47,500
  • Annual Tax (71.7 mills): $3,406
  • Monthly Payment: $284

Note: All exemptions require annual application and approval. Calculations use average mill levy - actual rates vary by special district location.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Park County require property tax escrow accounts for borrowers with less than 20% down payment, though some lenders may require escrow regardless of down payment amount. Your lender will collect 1/12th of your estimated annual property tax bill each month along with your mortgage payment, then pay your property taxes directly to Park County when they become due.

Park County's split payment schedule (first half due September 1, second half due March 1) means your lender will typically make two payments per year from your escrow account. Lenders are required to conduct annual escrow analyses to ensure adequate funds are collected, and you'll receive a statement showing the analysis results. If your property taxes increase due to reassessment or mill levy changes, your monthly escrow payment may be adjusted. You can verify that your lender has made timely payments by checking with the Park County Treasurer's office or through their online payment portal, as you remain ultimately responsible for ensuring taxes are paid even when escrowed.

How HonestCasa Helps
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Section 6

Frequently Asked Questions

Q: When are Park County property taxes due for the current tax year? A: Property taxes are due in two installments: first half by September 1, 2025, and second half by March 1, 2026. First half payments become delinquent after November 10, 2025.

Q: What tax credits are available and do I need to apply? A: The 25% Homeowner Exemption reduces assessed value for qualifying residential properties, and the 50% Senior Homeowner Exemption is available for homeowners 65+ who meet residency requirements. Both require annual application with the Park County Assessor's office and are not automatically applied.

Q: How does the Homestead credit work in Wyoming? A: Wyoming's homestead exemptions reduce the assessed value of your property rather than capping assessment increases. The 25% exemption removes 25% of your assessed value from taxation, while the 50% senior exemption provides greater relief for qualifying elderly homeowners.

Q: When does Park County reassess properties? A: Wyoming law requires annual assessment of all properties. Park County conducts revaluations each year, with notices typically mailed by May 31st. Property owners have until July 20th to file formal appeals with the County Board of Equalization.

Q: What are the penalties for late property tax payments? A: Late penalties begin accruing immediately after the due dates. Interest and penalties compound monthly, and properties may eventually be subject to tax sale proceedings if taxes remain unpaid for extended periods.

Q: Can I pay my property taxes online? A: Yes, Park County offers online property tax payment options through their official website. You can pay by electronic check or credit card, though credit card payments may include processing fees.

Q: Why did my tax bill increase if my mill levy stayed the same? A: Tax bills can increase due to rising property values during reassessment, new special district assessments in your area, or changes in exemption eligibility. Even with stable mill rates, increased assessed values result in higher tax bills.

Q: How do special district taxes work in Park County? A: Your property may be served by multiple special districts (fire, school, library, etc.), each with its own mill levy. Your total tax rate combines all applicable district rates, which is why rates vary significantly by location within Park County.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
fy25-26 budget summaryparkcounty-wy.gov
02
County
Park County Treasurer Property Taxparkcounty-wy.gov
03
County
Assessments - Park County Wyomingparkcounty-wy.gov
04
County
Park County Assessorparkcounty-wy.gov
05
Tax Doc
Wyoming Property Tax Relief Statuswyoleg.gov
06
Tax Doc
Tax Relief & Exemptionsparkcounty-wy.gov
07
County
Legislation - Park County Wyomingparkcounty-wy.gov
08
Long Term Homeowners Application. ...parkcounty-wy.gov
09
County
Wyoming County Profileseadiv.state.wy.us
10
County
Park County Transit Feasibility Studyrosap.ntl.bts.gov
All sources verified as of 2025 Tax Year

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