It is located about 30 miles west-northwest of MN's capital city of Saint Paul. Zip code: 53219. Showers And Thunderstorms. The official US Postal Service name for 46140 is GREENFIELD, Indiana. Find MoreCities in Ohio that start with G, Post Office Suburb:GREENFIELD, OH, 45123-9998, . Greenfield is a village of Highland, Ohio in the Great Lakes region of the USA. The Residential addresses are segmented by both Single and Multi-family addessses. Schools in ZIP Code 46140.