Is there a free website search where you can find out who owns a car by their liscense plate number in Wisc?

There are no free sites and there are no fee sites, because it is illegal.

It is illegal to obtain name and address through the DMV. You can't get that info by using the plate number for privacy reasons.

A California DMV employee gave a private investigator an actress’ address. The investigator gave the address to the stalker who then killed the actress.

So in 1997 the Uniform Motor Vehicles Records Disclosure Act, also known as the Driver's Privacy Protection Act (DPPA) was passed.

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As already stated there is no way for you to find out who owns a car by using the plate number. If the issue is accident related, the police should be able to get that information and will include it in their report. If there is no accident involved, yhou are out of luck tracking down the owner personally.

no. there are none for free, and not even any you can pay for.

the only legal way to access that information is to be a law enforcement agency or the DMV.

No there is not due to privacy laws