Careers, Jobs and Education Resources for: Irwin, OH
Irwin is an unincorporated community in southwestern Union Township, Union County, Ohio, United States. It is located on both sides of State Route 161, several miles south west of Marysville and Milford Center and northeast of Mechanicsburg. Irwin is the location of a post office, which serves the surrounding area, including the small town of Rosedale. The ZIP Code is 43029. Irwin's elevation is 1,010 feet (308 meters) above sea level.