Fairfield Township is located 20 miles north of Cincinnati, Ohio, in Butler County, occupying approximately 17.7 square miles. The Fairfield Township Fire Department, operates out ... See more out of two fire stations serving a community of approximately 15,000. Fairfield Township is primarily residential with a rapidly growing commercial district and light industrial structures. Our main focus is fire suppression, emergency medical service, rescue, fire prevention, and public safety education.