Webclick on the appropriate city below to get licensing information for your pets. These cities do not issue licenses, but can be purchased through polk county: If you’ve already created a. Webyou are required by law to annually license all pets 6 months or older. Pet license are due by april 30. On or after may 1, a $25/pet late fee will apply. New residents and/or new. The mission of the polk county sheriff's office is to preserve the integrity of the. You can register your pets online! You will be asked to upload copies of your rabies vaccination certificate and proof of spay or neuter (if applicable).