Leominster Zip Code - Find here the list of all the postal codes used in Worcester city of Worcester County in Massachusetts state of United States of America. Codes, Boston Zip Codes, Worcester Zip Codes, Springfield Zip Codes, Fall River Zip Codes. Area code and google map for Leominster. Most Popular Sites That List Leominster Zip Code. Outlined below is a zip code list for Leominster. Explore Leominster, Massachusetts zip code map, area code information, demographic, social and economic profile. Leominster, MA has only one ZIP Code assigned to its area. Find zip code of address in Leominster, MA on the map. Leominster MA Zip Code Lookup and List. Leominster, Massachusetts Zip Code Map & Detailed Profile.