Governor Pat Quinn and Mayor Rahm Emanuel joined more than a dozen groups for a rally and march.
It was to mark the 100th day since the Senate passed its comprehensive immigration reform bill.
They're now asking the House to do their part in order to bring immigration reform to a vote.
"We are the city of big shoulders. Why? Because it's built on the shoulders of immigrants," Emanuel said." Whether they're from Ireland or India, Mexico or Morocco, Pakistan or Peru, they always come here. To the most American of America's cities, the city of Chicago."
Saturday's rally was followed by a march from Union Park to Federal Plaza, where a second rally was held.