Massie Township, one of the eleven townships of Warren County, Ohio, United States, is located in the northeast part of the county and is the least populous of Warren County's townships. The population was 1,195 as of the 2020 census. It is the home of the Ohio Renaissance Festival and Caesar Creek State Park.

Warren County is a county located in the southwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 242,337. Its county seat is Lebanon and largest city is Mason. The county is one of Ohio's most affluent, with the highest median income of the state's 88 counties. The county was established on May 1, 1803, from Hamilton County; it is named for Dr. Joseph Warren, a hero of the Revolution who sent Paul Revere and the overlooked William Dawes on their famous rides and who died at the Battle of Bunker Hill. Warren County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.