Perry Township is one of twenty townships in Allen County, Indiana, United States. As of the 2010 census, its population was 29,158, up from 18,170 in 2000. The Dutch Ridge Historic District and Fisher West Farm are listed on the National Register of Historic Places. The Irene Byron Tuberculosis Sanatorium-Physician Residences were listed between …Perry Township is one of twenty townships in Allen County, Indiana, United States. As of the 2010 census, its population was 29,158, up from 18,170 in 2000. The Dutch Ridge Historic District and Fisher West Farm are listed on the National Register of Historic Places. The Irene Byron Tuberculosis Sanatorium-Physician Residences were listed between 2004 and 2013.