Property tax in Black Hawk County, Iowa

By Brent Chudoba, editor Updated September 23, 2026

The median property tax bill in Black Hawk County, Iowa is $2,842 a year, which is about 1.5% of the county's median home value of $188,900. 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 Black Hawk County

Enter a home's market value for a ballpark at Black Hawk County's average effective rate of 1.5% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.

Home market value

Estimated property tax: $2,834 / year

Property tax in Black Hawk County at a glance

Black Hawk County, Iowa property tax (Census ACS, reviewed September 23, 2026)
Measure	Value
Median annual property tax	$2,842
Median home value	$188,900
Effective tax rate	1.5%
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 Black Hawk County compare in Iowa?

Among Iowa's 99 counties, Black Hawk County has the 14th highest effective property-tax rate: 13 rank higher and 85 rank lower. That places it among the most heavily taxed counties in the state. Nationally, it ranks 344th of 3135 US counties by effective rate. See every Iowa county ranked.

How much do homeowners in Black Hawk County actually pay?

The median is only the middle bill. Across Black Hawk County's 36,139 owner-occupied homes, 45% pay $3,000 or more a year in property tax, 67.5% pay at least $2,000, and 6.6% pay under $800. Another 2.9% report paying no property tax at all, which usually means an exemption covers the whole bill.

Annual property tax paid by Black Hawk County homeowners (Census ACS 2020-2024)
Annual bill	Homes	Share
Under $800	2,388	6.6%
$800 to $1,499	4,320	12%
$1,500 to $1,999	3,978	11%
$2,000 to $2,999	8,144	22.5%
$3,000 or more	16,257	45%
No property tax paid	1,052	2.9%

Owners with a mortgage pay a median of $2,855 and owners without one pay $2,816. That is within 10% either way, so in Black Hawk County paying off the house does not go with a noticeably different bill. Census table B25103.

How does the Black Hawk County property tax bill compare with local incomes?

The median property tax bill of $2,842 is about 3.4% of the median income of Black Hawk County homeowner households, $83,817 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 66.2% of Black Hawk 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 Black Hawk County?

Yes. The median bill went from $2,419 in 2015-2019 to $2,842 in 2020-2024, a 17.5% rise. Over the same span the median home value moved 28.1%, from $147,500 to $188,900. 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 Black Hawk County

Black Hawk County borders 7 counties.

Black Hawk County and its neighbors, highest effective rate first (Census ACS 2020-2024)
County	Effective rate	Median bill	Median home value
Black Hawk County, IA (this county)	1.5%	$2,842	$188,900
Tama County, IA	1.37%	$2,043	$148,600
Buchanan County, IA	1.36%	$2,390	$176,000
Butler County, IA	1.35%	$2,226	$165,400
Benton County, IA	1.31%	$2,727	$208,200
Fayette County, IA	1.3%	$1,782	$136,800
Bremer County, IA	1.29%	$2,824	$219,600
Grundy County, IA	1.14%	$2,273	$198,800

How is a home assessed in Black Hawk County?

Iowa sets the assessment rules and Black Hawk County applies them. How Iowa assesses and reappraises homes.

Is there a homestead exemption in Black Hawk 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 Black Hawk County. Iowa's exemptions and relief programs in full.

When are property taxes due in Black Hawk 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. Black Hawk County issues and collects the bill, so the dates printed on your statement are the ones that bind you.

How to appeal your Black Hawk 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; Black Hawk 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

Sources

Median real estate taxes paid and median home value for Black Hawk 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.