ZIP Code 50602
About Allison
Allison is a city in, and the county seat of, Butler County, Iowa, United States. The population was 966 at the 2020 census. Allison is home to the Butler County Fair. The city was named for U.S. Senator William B. Allison in 1881.
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Area Profile
US Census (ACS 5-year · Gazetteer)
1,372
population
$64,722
median household income
17
people / sq mi
$103,600
median home value
$615
median gross rent
47.1
median age
675
housing units
616
households
78.9
land area (sq mi)