- COORDINATES: 39.792109, -77.735901
- COUNTY: Franklin
- DISTANCE TO NEXT: Waynesboro - 8
- EXPLANATION OF NAME: Named for Greencastle In North of Ireland
- FOUNDED: 1750
- MANUFACTURER: Carlisle Foundry Company
- STATUS: Note bottom section of marker was broken and was rebuilt. Text "Founded 1750" is painted on. Original post was lost. Marker is on an aluminum "lamppost" which has been modified by inserting what appears to be the upper section of the original post into the top. Marker is mounted on this round section.

photo June 2011 by Mike Natale

Photo 2011 by J Graham

Photo 2011 by J Graham

January 2016 photo by Mike Wintermantel

January 2016 photo by Mike Wintermantel

January 2016 photo by Mike Wintermantel
PA 16 at west end of town