Rosewood is an unincorporated community and census-designated place (CDP) in northwestern Adams Township, Champaign County, Ohio, United States. As of the 2010 census it had a population of 257. Although it is unincorporated, it has a post office, with the ZIP code of 43070. It lies along State Route 29, an east-west highway.
Rosewood was laid out and platted in 1893 when the railroad was extended to that point. A post office has been in operation at Rosewood since 1894.