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.

Johnston, 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

2.48%–3.62%+49.4%YoY

Varies by school district

Municipal Portioni

0.0000%0% of total

Effective Ratei

1.15%–1.68%

Est. Annual Taxi

$4K–$6K

Median Home Valuei

$369,100

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

$1.19 JOHNSTON CITY/JOHNSTON SCH

$1.19 JOHNSTON CITY/JOHNSTON SCH/93 E CENTRAL TIF B

$1.19 JOHNSTON CITY/JOHNSTON SCH/05 AMD BEAVER CRK

$1.19 JOHNSTON CITY/JOHNSTON SCH/08 NW 100TH ST TIF

$1.19 JOHNSTON CITY/JOHNSTON SCH/11 AMD BEAVER CRK

$1.19 JOHNSTON CITY/JOHNSTON SCH/13 AMD E CENTRAL T

$1.19 JOHNSTON CITY/JOHNSTON SCH/13 W CENTRAL TIF B

$1.19 JOHNSTON CITY/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF BASE

$1.19 JOHNSTON CITY/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF INCR

$1.19 JOHNSTON CITY/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF BASE

$1.19 JOHNSTON CITY/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF INCR

$1.19 JOHNSTON CITY/JOHNSTON SCH/23 AMD W CENTRAL TIF BASE

$1.19 JOHNSTON CITY/JOHNSTON SCH/23 AMD W CENTRAL TIF INCR

$1.19 JOHNSTON CITY/JOHNSTON SCH/23 NW 86TH ST TIF BASE

$1.19 JOHNSTON CITY/JOHNSTON SCH/23 NW 86TH ST TIF INCR

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/23 NW 86TH ST TIF BASE

$0.91 JOHNSTON CITY AG/JOHNSTON SCH

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF BASE

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/13 W CENTRAL TI

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/23 NW 86TH ST TIF INCR

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF INCR

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/23 AMD W CENTRAL TIF BASE

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/93 E CENTRAL TI

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/08 NW 100TH ST

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/23 AMD W CENTRAL TIF INCR

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF BASE

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/13 AMD E CENTRA

$0.91 JOHNSTON CITY AG/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF INCR

$0.81 JOHNSTON CITY EXEMPT AG/JOHNSTON SCH

$0.81 JOHNSTON CITY EXEMPT/JOHNSTON SCH

Estimated Tax by Home Valuei

$250K

$2,063–$3,016

$300K

$2,475–$3,619

$350K

$2,888–$4,222

$400K

$3,300–$4,825

$450K

$3,713–$5,428

$500K

$4,125–$6,031

$550K

$4,538–$6,634

Highlighted value is closest to median home value ($369K)

30 Overlapping Taxing Districtsi

JOHNSTON CITY/JOHNSTON SCH

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/93 E CENTRAL TIF B

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/05 AMD BEAVER CRK

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/08 NW 100TH ST TIF

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/11 AMD BEAVER CRK

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/13 AMD E CENTRAL T

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/13 W CENTRAL TIF B

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF BASE

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF INCR

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF BASE

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF INCR

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/23 AMD W CENTRAL TIF BASE

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/23 AMD W CENTRAL TIF INCR

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/23 NW 86TH ST TIF BASE

118.8%3.6191%

JOHNSTON CITY/JOHNSTON SCH/23 NW 86TH ST TIF INCR

118.8%3.6191%

JOHNSTON CITY AG/JOHNSTON SCH/23 NW 86TH ST TIF BASE

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF BASE

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/13 W CENTRAL TI

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/23 NW 86TH ST TIF INCR

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/18 AMD NO 4 BEAVER CRK W TIF INCR

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/23 AMD W CENTRAL TIF BASE

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/93 E CENTRAL TI

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/08 NW 100TH ST

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/23 AMD W CENTRAL TIF INCR

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF BASE

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/13 AMD E CENTRA

91.1%2.7757%

JOHNSTON CITY AG/JOHNSTON SCH/20 AMEND NO 1 NW 100TH ST TIF INCR

91.1%2.7757%

JOHNSTON CITY EXEMPT AG/JOHNSTON SCH

81.2%2.4753%

JOHNSTON CITY EXEMPT/JOHNSTON SCH

81.2%2.4753%