Property tax in Boone County, Iowa
The median property tax bill in Boone County, Iowa is $2,910 a year, which is about 1.37% of the county's median home value of $212,400. That effective rate is higher than the typical Iowa county (1.32%) and higher than the national median (0.81%). These are American Community Survey 5-year estimates (2024); your own bill depends on your home's assessed value and any exemptions.
Estimate the property tax on a home in Boone County
Enter a home's market value for a ballpark at Boone County's average effective rate of 1.37% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.
Estimated property tax: $2,910 / year
Property tax in Boone County at a glance
| Measure | Value |
|---|---|
| Median annual property tax | $2,910 |
| Median home value | $212,400 |
| Effective tax rate | 1.37% |
| Typical Iowa county rate | 1.32% |
| National median county rate | 0.81% |
Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.
How does Boone County compare in Iowa?
Among Iowa's 99 counties, Boone County has the 32nd highest effective property-tax rate: 31 rank higher and 67 rank lower. That is on the higher side for Iowa. Nationally, it ranks 489th of 3135 US counties by effective rate. See every Iowa county ranked.
How much do homeowners in Boone County actually pay?
The median is only the middle bill. Across Boone County's 8,749 owner-occupied homes, 47.1% pay $3,000 or more a year in property tax, 69.2% pay at least $2,000, and 5.9% pay under $800. Another 1.9% report paying no property tax at all, which usually means an exemption covers the whole bill.
| Annual bill | Homes | Share |
|---|---|---|
| Under $800 | 520 | 5.9% |
| $800 to $1,499 | 1,140 | 13% |
| $1,500 to $1,999 | 871 | 10% |
| $2,000 to $2,999 | 1,937 | 22.1% |
| $3,000 or more | 4,119 | 47.1% |
| No property tax paid | 162 | 1.9% |
Owners with a mortgage pay a median of $3,001 and owners without one pay $2,769. That is within 10% either way, so in Boone County paying off the house does not go with a noticeably different bill. Census table B25103.
How does the Boone County property tax bill compare with local incomes?
The median property tax bill of $2,910 is about 3% of the median income of Boone County homeowner households, $96,839 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 80% of Boone County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.
Have property taxes gone up in Boone County?
Yes. The median bill went from $2,052 in 2015-2019 to $2,910 in 2020-2024, a 41.8% rise. Over the same span the median home value moved 60.1%, from $132,700 to $212,400. Bills rose more slowly than values, which is what assessment caps and falling millage rates do: the county is taxing a smaller share of each home's worth.
Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.
Property tax in counties next to Boone County
Boone County borders 6 counties.
| County | Effective rate | Median bill | Median home value |
|---|---|---|---|
| Polk County, IA | 1.68% | $4,396 | $262,100 |
| Dallas County, IA | 1.41% | $5,001 | $355,600 |
| Story County, IA | 1.4% | $3,632 | $258,700 |
| Webster County, IA | 1.39% | $2,138 | $153,800 |
| Boone County, IA (this county) | 1.37% | $2,910 | $212,400 |
| Hamilton County, IA | 1.26% | $1,977 | $156,400 |
| Greene County, IA | 1.15% | $1,783 | $155,400 |
How is a home assessed in Boone County?
Iowa sets the assessment rules and Boone County applies them. How Iowa assesses and reappraises homes.
Is there a homestead exemption in Boone County?
Yes. From the 2026 assessment year Iowa exempts 10% of a homestead's taxable value, never less than $5,500 or more than $20,000. File form 54-028 with your assessor by July 1. That is the Iowa rule, and it applies in Boone County. Iowa's exemptions and relief programs in full.
When are property taxes due in Boone County?
Iowa bills for a fiscal year running July 1 to June 30 and you pay the county treasurer in two halves, the first by September 30 and the second by March 31. The statute technically says pay before September 1 and March 1, but nothing goes delinquent and no interest accrues until October 1 and April 1, which is why counties advertise the end of September and March as the real deadlines. If the last day lands on a weekend you have until the second business day of the following month.
Iowa splits the bill into 2 installments. That is the Iowa rule. Boone County issues and collects the bill, so the dates printed on your statement are the ones that bind you.
How to appeal your Boone County property assessment
You contest the assessed value with the your local board of review, then the Property Assessment Appeal Board or district court. The filing deadline is typically April 30, with protests accepted from April 2 onward. That is the Iowa rule; Boone County sets the exact dates and forms. The Iowa appeal process step by step.
Iowa rules from primary state sources, reviewed September 7, 2026; sources on the Iowa page.
Work out your own numbers
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How much house can I afford?
Your income, debts and down payment against the 28/36 rule lenders actually use, with Boone County's tax rate to hand.
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Mortgage calculator
Monthly payment with principal, interest, tax and insurance, plus what an extra payment saves you.
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Iowa income tax
Brackets, standard deduction and what Iowa actually taxes.
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Sales tax in Boone County
The other local tax: combined state and local rate for this county.
Sources
- Median real estate taxes paid and median home value for Boone County, Iowa: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103, B25077, B25102, B25119 and B25003; the five-year comparison uses the 2015-2019 estimates. Neighboring counties: Census county adjacency file.