The Ohio Department of Jobs and Family Services and Cuyahoga County Division of Children & Family Services don't explicitly state that an adoption agency is mandatory for adoption. However, they imply on their websites that using their services or hiring a private agency is a route most prospective parents take.
Both government departments offer classes, pre-adoption visits, financial assistance and other resources for prospective parents, according to their official websites. They remind parents to ask whether comparable resources are available through private agencies. The government adoption agencies also conduct a home study, which helps to ensure that the adoptive couple can provide a good environment for the adopted child.