​
Rank
County
Avg. Monthly Mortgage Payment
Avg. Monthly Rent
Avg. Home Price
Breakeven Year
Rent vs. Buy Index
1
Saint Clair, IL
$712
$1,268
$186,107
1.0
98.7
2
Winnebago, IL
$667
$1,111
$174,457
1.0
98.6
3
Kankakee, IL
$822
$1,282
$215,060
1.1
98.4
4
Peoria, IL
$703
$1,053
$183,776
1.1
98.3
5
Effingham, IL
$864
$1,017
$226,019
1.1
98.3
6
La Salle, IL
$802
$1,191
$209,616
1.2
98.0
7
Stephenson, IL
$549
$894
$143,476
1.4
97.6
8
Calhoun, IL
$942
$1,268
$246,301
1.4
97.6
9
Clinton, IL
$912
$1,268
$238,404
1.4
97.5
10
Adams, IL
$759
$1,006
$198,472
1.4
97.5
 
 
Additional details on the study, including the methodology and interactive map, can be found here: https://smartasset.com/mortgage/rent-vs-buy#Illinois