Gov. Pat Quinn has $2.9 million in his 2014 campaign fund - more than all four of his Republican rivals combined.
Reports filed with the state late Tuesday show the Chicago Democrat raised about $813,000 during the three-month period ending Sept. 30. He has no major challenger in the March primary since Bill Daley abandoned his bid.
Four Republicans are seeking the GOP nomination.
Billionaire businessman Bruce Rauner raised about $1 million during the third quarter. But he spent $1.1 million, leaving him with about $594,000.
State Treasurer Dan Rutherford raised about $337,000 and finished the period with about $1.2 million.
State Sen. Bill Brady raised $66,000 and had about $273,000 on hand.
State Sen. Kirk Dillard brought in about $314,000 and finished with about $205,000.