Irwin, Ohio

Irwin is an unincorporated community in southwestern Union Township, Union County, Ohio, United States. It is located at the intersection of Ohio State Route 4 and 161. Irwin has a post office which serves the surrounding area, including the community of Rosedale.
  • Elevation: 1,011 ft (308 m)
  • Country: United States
  • State: Ohio
  • Counties: Union
  • ZIP code: 43029
  • Area code: 614
  • GNIS feature ID: 1064891
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