Lima is a city in and the county seat of Allen County, Ohio, United States. As of the 2020 census, the city had a population of 35,579. It is located in northwest Ohio along Interstate 75, approximately 72 miles north of Dayton, 78 miles southwest of Toledo, and 63 mi southeast of Fort Wayne, Indiana. Lima was founded in 1831. The Lima Army Tank Plant, officially called the Joint Systems Manufacturing Center, built in 1941, is the sole producer of the M1 Abrams.