Sharp instruments were used to scratch along the side of seven parked cars in Brixworth on Sunday (May 5).
The cars were damaged in Broad Street between 1am and 1.30am with the offenders described as a group of four people, aged between 16 and 17. The group ran off towards The Ashway area.
Police are appealing for information and witnesses to the incident.
Anyone with information, should call Northamptonshire Police on 101 - alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.