Collinsville is an unincorporated community and former village in southeastern Milford Township, Butler County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 45004. It lies at the intersection of U.S. Route 127 and State Route 73.
- U.S. Geological Survey Geographic Names Information System: Collinsville
- Zip Code Lookup Archived 2007-10-08 at the Wayback Machine.
- Overman, William Daniel (1958). Ohio Town Names. Akron, OH: Atlantic Press. p. 32.
- Bartlow, Bert Surene (1905). Centennial History of Butler County, Ohio. B. F. Bowen. p. 351.
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