2020Final results
2020 election for Illinois's 12th District
U.S. House · Illinois
Mike Bost (R) won with 60.4% of the vote, defeating Raymond C. Lenzi (D) by 20.9 points.
Mike BostRepublican · winner
60.4%194,839
Raymond C. LenziDemocrat
39.6%127,577
322,416 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Raymond C. LenziMike Bost
$162.5K
Raised by the campaign
$1.9M
$162.7K
Spent by the campaign
$1.5M
$0
Cash on hand
$413.8K
Campaign money: FEC, through Dec 31, 2020.
Source: FEC campaign filingsUpdated Dec 31, 2020