In an editorial Sunday, the paper cited Emanuel's plans for improving the city's schools, public safety and the budget crisis.
The paper also touted Emanuel's experience in the White House as well as his time in Congress.
"He gets big things done," the paper wrote.
Emanuel's candidacy was in jeopardy when an appeals court ruled that he didn't meet the residency requirements to run for mayor. But, the Illinois Supreme Court last week reversed that ruling and ordered his name to be restored to the ballot.
Other candidates in the race include former Chicago schools president Gery Chico and former U.S. Sen. Carol Moseley Braun.
The Associated Press contributed to this report.