The Chicago Democrat topped a lesser-known challenger, activist Tio Hardiman, in Tuesday’s primary.
In November, he will face the winner of the Republican primary among businessman Bruce Rauner state Sens. Bill Brady and Kirk Dillard and Treasurer Dan Rutherford.
Quinn took a low-key approach to his primary race, saying he’s focusing on doing his job and that Illinois voters know his record.
With no serious opponent, Quinn didn’t have to dig into his campaign funds. He finished 2013 with about $4.5 million in his campaign fund.
Quinn has ramped up his campaign in recent weeks, hiring a strategist who managed New York Mayor Bill de Blasio’s campaign.