The Daily Herald reports 21-year-old Matthew Cavallaris and 20-year-old Adam Lehnus pleaded guilty to a misdemeanor.
They were each sentenced to 50 hours of community service, ordered to write apologies and pay $175 for repairs to the sculpture called "Nighty-Knight."
Investigators say the pair of college students were drunk in June when they swiped the dragon from the yard of Naperville Mayor George Pradel before dragging it across the street and tossing off a railroad bridge.
The dragon was one of 50 sculptures commissioned for a 2006 fundraiser.
An attorney called it a "stupid kid prank" and says the men apologized.
The dragon, meanwhile, is back in Pradel's yard.