The Ohio Military Reserve (OHMR) is one of three separate components that make up the Ohio State Defense Force (SDF). Like other SDF's the Ohio Military Reserve functions as a reserve to the Ohio National Guard.

The State Guard Association of the United States (SGAUS) is a non-profit organization advocating for the advancement and support of regulated state military forces, as established by state governments under the authority of federal law. The SGAUS encourages the establishment and advancement of regulated state forces through lobbying and affiliation with independent state associations.