All citizens in the state of Michigan are required to license their dogs four months or older. A current rabies vaccination certificate from a licensed Michigan veterinarian is required in order to license dogs. There is no reciprocity for out of state dog licenses, however, dog licenses from other Michigan counties are recognized. We begin selling licenses for the upcoming year on December 1st, and the deadline for a dog license purchase is May 31st. Licenses are only valid for the calendar year (January 1st - December 31st) and must be renewed annually.