Cost of living in Johnston, IA

Johnston is a Census city in Polk County, IA. ACS 2024 5-year population is 24,384. Median gross rent is $1,338 (ACS 2024 5-year, this place). Median home value is $369,100. Median household income is $106,551. Insurance is the NAIC state average; food is a USDA plan — no town indexes.