- COORDINATES: 40.440518, -77.990350
- COUNTY: Perry
- DISTANCE TO NEXT: Marysville - 8
- EXPLANATION OF NAME: Formerly "Petersburg" Renamed For Duncan Family
- FOUNDED: 1844
- MANUFACTURER: Carlisle Foundry Company, Carlisle PA
- SHAPE: Standard 1-sided
- STATUS: Marker was found stored in basement of Borough office. Repaired and repainted by KMT and Borough and reinstalled on original post in 2010. Local historians disagree with the information on this marker, contending the town was named for Duncannon, Ireland.
2009 photo by J. Graham of marker as found stored at Borough office.
2010 photo by J. Graham of repaired and repainted marker.
November 2017 photo by Mike Wintermantel
Main Street ((Old U.S. Route 11) at east end of town