Governor Pat Quinn and his Republican opponent Bill Brady greeted some of the people who lined the street in Elgin.
This year's parade celebrated the city's rich history, it's present and what everyone hopes is a prosperous future. 2010 marks the 175th anniversary of Elgin's founding.
Several other politicians also took part in the parade, including lieutenant governor candidate Sheila Simon, Congressman Bill Foster, Senate candidate Mark Kirk and comptroller candidate Julie Fox.
The parade turned ugly when a fight among neighbors near the parade route resulted in two injuries and four arrests.
Elgin Police Chief Jeffrey Swoboda says the fight started shortly after 10 a.m. when the parade began.
He was at the head of the parade riding in police department vehicle and jumped out to respond. He tackled one of the suspects involved in the fight.
Fire department spokesman Tim Michaels says two men were transported to an area hospital. Their conditions were not immediately available.
Information on the arrests wasn't immediately available.
The altercation didn't affect the parade in Elgin, which is about 40 miles northwest of Chicago.
The Associated Press contributed to this report.