- Welcome to Monson, Maine Town of Monson PO Box 308 Monson, ME 04464 Piscataquis County State of Maine 45:17:13N 69:30:06W Elevation: 850 feet Census 2000 population: 666 Town Facts Town History Town Businesses Town Government Town Organizations Town Aerial Photo Town Religious Organizations You are number 16584 to visit our site. CURRENT SITE FEATURE: Sheldon Slate operation in Monson! Page ...www.kynd.net/monson/index.html