To change the address on a dog license, call the offices of the county in which you live. The county provides information on purchasing, updating or renewing dog licenses, and as each county has its own requirements, it is the most effective way to update a license.
Some counties, such as Maricopa County in Arizona, have online forms with which you can easily edit and update the information on a dog license. Others, such as Cuyahoga County in Ohio, ask that you call them directly to update the information. When moving within a county, the process involves simply updating the address; if making a move to a different county, or out of state, you may have to purchase a new dog license.