Tyres have been slashed and windows smashed. Swaztikas and other symbols have also been scratched into the paint. Police are now looking for witnesses.
"It's spread out over such a large area that we don't think it is targeted at one particular person", local police spokesman Thommy Thorngren told Swedish Radio's local P4 Jönköping channel.
The cars were parked in several different areas of the town, including at the local Science Park and a supermarket.