The Judge John C. Flanagan Residence is a house in Peoria, Illinois, United States. The home was constructed for Judge John C. Flanagan, a Philadelphia native, in 1837. The house was either part of an original 620-acre (250 ha) tract purchased by Flanagan's father from local Native American tribes or part of a 20-acre (8.1 ha) tract purchased by Flanagan when he came to Peoria in 1831. It is believed that Abraham Lincoln was once a guest in the home during the Lincoln-Douglas debates from 1854 to 1860. The building was added to the National Register of Historic Places on September 5, 1975.[1]