Quigley was expected to win in the heavily-Democratic district, but had to beat out 11 other candidates in a free-for-all primary last month.
The Associated Press has more:
Democrat Mike Quigley, a reform-minded Cook County commissioner, has claimed the high-profile Illinois congressional seat that Rahm Emanuel gave up to be President Barack Obama's chief of staff.
The 50-year-old Quigley trounced Republican nominee Rosanna Pulido and Green Party candidate Matt Reichel for the 5th Congressional District seat that Emanuel first won in 2002.
With 56 percent of precincts reporting, Quigley had 15,181 or 74 percent of the vote. Pulido had 3,948 or 19 percent and Reichel had 7 percent.
The district that includes Wrigley Field is a Democratic stronghold stretching from Chicago's wealthy North Side lakefront to ethnic neighborhoods on the northwest side and neighboring Cook County suburbs.