Puerto Rico Highway 31

Highway 31
Highway 31
Ruta 31
Route information
	Maintained by Puerto Rico DTPW
Length	25.55 km (15.88 mi)
Existed	1953–present
Major junctions
West end	PR-30 / PR-189 in Ceiba Norte
	PR-198 in Ceiba Norte; PR-9185 in Ceiba Norte; PR-948 / PR-9936 in El Río; PR-936 in Boquerón–El Río; PR-924 in Peña Pobre; PR-191 in Río Blanco; PR-53 in Río Blanco; PR-192 in Río–Maizales; PR-205 in Naguabo barrio-pueblo–Duque; PR-971 in Duque–Mariana;
East end	PR-3 in Mariana
Location
Country	United States
Territory	Puerto Rico
Municipalities	Juncos, Las Piedras, Naguabo
Highway system
	Roads in Puerto Rico; List;

Puerto Rico Highway 31 (PR-31) is a main, rural highway connecting Juncos with Naguabo in eastern Puerto Rico. This road begins at Puerto Rico Highway 198 and ends at Puerto Rico Highway 3.