Officer David Savage was reportedly driving on Old County Road early Wednesday morning, when the horse ran into the passenger-side door.
The impact broke the cruiser’s windshield and side window, and ripped the light bar off the roof.
Savage was hit by flying glass, but didn’t suffer any serious injuries.
A veterinarian was called to the scene, and it was determined the horse needed to be put down.
There has been no word on how the animal got loose in the first place.