The Timaru District Council is calling for information after the head of a statue of Robbie Burns was removed overnight on Saturday night.
Mayor Janie Annear said the reward would match the estimated value of damage to the statue, if it can be repaired, after its head was removed. She wants the head returned and anyone with information on the "mindless act of vandalism" to come forward.
"It is highly likely that several people know who is involved and someone with a social conscience will pass on the information."
The damage to the statue was the second case of vandalism involving a public artwork in the district this year. A bronze statue, which was part of the Heartland Sculpture Challenge held in 2010, was taken from its plinth in Pleasant Point last month. It has since been found.