Dallas County, IA Property Tax: $4,849/yr (2026)
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The effective property tax rate in Dallas County is 1.45% of assessed home value. On a home at the county median value of $333,400, that works out to about $4,834 per year, or $403 per month. Dallas County is located in central Iowa, and is home to approximately 104,136 residents.
About Dallas County
Dallas County covers approximately 588.2 square miles in Iowa. The county is home to about 104,136 residents living in roughly 43,195 housing units, of which 65.7% are owner-occupied. The median household income is $102,349, and the median home was built in 2005.
Dallas County borders Adair County, Boone County, Greene County, Guthrie County, Madison County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Iowa
Property taxes in Iowa 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 Iowa 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 Dallas County Assessor's office to learn which exemptions apply to your property and when to file.
Dallas County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Dallas County, IA | 1.45% | $333,400 | $4,834 |
| Iowa state average | 1.34% | — | $4,468* |
| Adair County | 1.32% | $140,600 | $1,858 |
| Boone County | 1.43% | $191,200 | $2,741 |
| Greene County | 1.20% | $140,500 | $1,682 |
| Guthrie County | 1.33% | $163,900 | $2,172 |
| Madison County | 1.55% | $236,900 | $3,681 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Dallas County's median home value of $333,400. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Dallas County's property tax rate compare to the rest of Iowa?
At 1.45%, Dallas County is higher than the Iowa state average of 1.34%. On a home at the county median of $333,400, that means about $4,834 per year — versus $4,468 at the state average rate, a difference of $366 per year. Compared to the national average of 1.10%, Dallas County is above average.
What's a typical annual property tax bill in Dallas County?
For a home at the county median value of $333,400, the annual property tax in Dallas County is approximately $4,834 — or about $403 per month. For a home worth $500,100, expect around $7,251 per year. For a $666,800 home, approximately $9,669 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Dallas County property tax assessment?
Property assessment appeals in Dallas County are handled by the Dallas 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 Dallas County?
Iowa 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 1.45% shown here. Contact the Dallas 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