Cost of living in Decatur, IL — Housing, Rent & Index

The median home value in Decatur, IL is $104,867 as of 2026-04. That places Decatur below the US average for housing cost, with a cost index of approximately 30 versus a national baseline of 100.

Over the past 12 months, the median home value in Decatur has climbed 9.1%, and over the past five years it has averaged +5.9% annual growth. The current price sits +0.0% from its 5-year peak in 2026-04.

Renters pay a median of $984 per month in Decatur. Rents have changed +2.6% over the last year and averaged — per year over five years.

Beyond housing, day-to-day costs in Decatur are shaped by state and local taxes, utility rates, transportation, and groceries. This page focuses on the housing component, which is the largest single line in most household budgets and the easiest to compare across cities using consistent national data.