The Allen County Museum is located in the city of Lima, the county seat of Allen County, Ohio, United States. Occupying a half city block, the museum campus includes the main museum building, a log house, the MacDonell House (a Victorian mansion), a Shay Locomotive display, the Children's Discovery Center, genealogy and local history library, railroad archives, and the Children's Garden. The museum is accredited by the American Alliance of Museums. According to recent reports of the American Alliance of Museums Accreditation Department, less than 800 museums, out of more than 11,000 in the United States, are accredited. Standards for accreditation apply across the board to both small and large institutions.