How are property tax rates determined in Iowa?

Property tax rates in Iowa are set by each taxing district (municipality, school district, park district, library, etc.) based on their annual levy (the amount of tax revenue they need). The rate is calculated by dividing the levy by the total assessed value of all property in the district.

What is the composite tax rate?

The composite tax rate is the sum of all overlapping taxing district rates that apply to a specific property. A typical property may be taxed by several overlapping districts. The composite rate determines your total tax bill when multiplied by your property's assessed value.

Why do tax rates vary within the same town?

Properties within the same municipality can have different composite rates because overlapping districts (school, park, fire, library) have different boundaries. A home in one school district may have a different rate than a home two blocks away in a different school district.

Rock Valley, IA Property Tax Rate 2026 — Full Breakdown by District

Showing latest tax year with year-over-year changes. Full rate history available with a paid plan. See products & pricing →

Property Tax — Tax Year 2025 (payable 2026)i

IA Dept of Management Property Tax

Composite Ratei

2.15%–3.50%+35.3%YoY

Varies by school district

Municipal Portioni

0.0000%0% of total

Effective Ratei

1.00%–1.62%

Est. Annual Taxi

$2K–$4K

Median Home Valuei

$231,200

Rate varies by school district. Your actual rate depends on which school district your property falls in.

Rate Trend — click a year to explorei

20242025

Municipal

Other Districts

Where Your Tax Dollar Goesi

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/120

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/UR/121 BASE

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/WESTVIEW/121

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/ROCK RIDGE U

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/RV UR AMDT 4/121-C BASE

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/RV UR AMDT 4/121-C INCREM

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/WESTVIEW AMDT 1/121-W1 INCREM

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/ROCK RIDGE UR AMDT 2/123-1 BASE

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/ROCK RIDGE UR AMDT 2/123-1 INCREM

$1.24 ROCK VALLEY CITY/ROCK VALLEY SCH/WESTVIEW AMDT 1/121-W1 BASE

$0.76 ROCK VALLEY CITY/ROCK VALLEY SCH/UR AMEND 4 AG/121-D BASE

$0.76 ROCK VALLEY CITY/ROCK VALLEY SCH/RV UR AMDT 4 AG/121-D INCREM

$0.76 ROCK VALLEY CITY AG/ROCK VALLEY SCH/125

Estimated Tax by Home Valuei

$100K

$716–$1,167

$150K

$1,075–$1,750

$200K

$1,433–$2,333

$250K

$1,791–$2,917

$300K

$2,149–$3,500

$350K

$2,507–$4,083

$400K

$2,866–$4,667

Highlighted value is closest to median home value ($231K)

13 Overlapping Taxing Districtsi

ROCK VALLEY CITY/ROCK VALLEY SCH/120

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/UR/121 BASE

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/WESTVIEW/121

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/ROCK RIDGE U

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/RV UR AMDT 4/121-C BASE

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/RV UR AMDT 4/121-C INCREM

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/WESTVIEW AMDT 1/121-W1 INCREM

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/ROCK RIDGE UR AMDT 2/123-1 BASE

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/ROCK RIDGE UR AMDT 2/123-1 INCREM

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/WESTVIEW AMDT 1/121-W1 BASE

123.9%3.5003%

ROCK VALLEY CITY/ROCK VALLEY SCH/UR AMEND 4 AG/121-D BASE

76.1%2.1494%

ROCK VALLEY CITY/ROCK VALLEY SCH/RV UR AMDT 4 AG/121-D INCREM

76.1%2.1494%

ROCK VALLEY CITY AG/ROCK VALLEY SCH/125

76.1%2.1494%