The Hamilton County Auditor's Office is an agent for the ODNR Division of Watercraft. If you would like assitance in deciding what steps (if any) will be necessary to title and/or register your boat and/or motor, please use one of the flowcharts below. If you would like more information regarding boat and motor titles and registration, click on the ODNR Division of Watercraft link below. This will take you to their web site.