Knox County, IL real estate

What the numbers say

Knox County, IL real estate at a glance

By AstroCore · Realtor.com, US Census and Freddie Mac data

In September 2026, the median home in Knox County listed for $151,150, down 7.7% from a year earlier. That is 53% below the Illinois median of $324,950.

Homes spent a median of 47 days on the market, slower than 46 days a year ago. That makes Knox County the #23 fastest-selling of 32 Illinois counties we track.

Homeowners in Knox County pay a median of $2,190 a year in property taxes on a median home value of $111,900, an effective rate of about 1.96%. The Illinois average is 2.01%, which makes Knox County the #67 lowest-tax of 102 counties in the state with published tax data.

Renters pay a median of $788 a month, and $846 for a two-bedroom. At today's prices a typical home costs about 16 times a year's rent.

With 20% down and today's 7.24% average 30-year rate, the monthly payment on a $151,000 home here comes to about $1,134 including property tax and insurance. Lenders typically want that to be under 28% of income, which works out to roughly $49,000 a year (the median household here earns $57,030).