Riverdale High School is a public high school near Mount Blanchard in Delaware Township, Hancock County, Ohio, United States. The school system is the result of a consolidation of three school districts. The communities of Forest (in Hardin County), Wharton (in Wyandot County) and Mt. Blanchard (in Hancock County) comprise the school district which consolidated in 1962. It is the only high school in the Riverdale Local Schools district.