If someone hits your parked car does their insurance company pay and do you still pay your deductible?

If you decide to go through your carrier -- and assuming your policy doesn't have a provision for waiving your deductible under these circumstances -- then, yes, you'll have to pay your deductible.

Your carrier will then pursue the at-fault party for all monies paid, including your deductible.

Keep in mind that applying your deductible has nothing to do with liability. It doesn't matter if your car was parked and unoccupied, or if you were rear-ended. Rather, the deductible is the portion you agreed to pay in the event of ANY loss, regardless of liability.

If the at-fault carrier agrees to pay for the damages (which they should, given the facts-of-loss), then you're correct: You wouldn't pay your deductible.

Your deductible applies only if you're going through your own carrier, and even then, the at-fault party still owes for ALL the damages. By avoiding your own carrier, you shouldn't have to pay out-of-pocket for any of the damages.

Also, if you do decide to go through your own carrier, they might waive your deductible if they confirm that the at-fault driver has active insurance, and if they confirm that the other carrier is willing to pay.

A personal experience:

When I called my insurance company about this, they told me that if the at-fault person's insurance company (I'm assuming they're At Fault since they hit a parked car) assumes liability (again, since they're most likely liable) they'll cover the damages and I won't have the pay the deductible. Did I hear this wrong? Also, I live in Pennsylvania, and from what I hear our insurance laws are a little goofy.