Puerto Rico Highway 863 (PR-863) is a road located in the municipality of Toa Baja in Puerto Rico. With a length of , it begins at its intersection with PR-2 in Candelaria barrio and ends at its junction with PR-862 on the Toa BajaâÂÂToa AltaâÂÂBayamón municipal tripoint.
This highway has a single lane per direction in the entire length and provides access to several communities and neighborhood developments between Candelaria, Mucarabones and Hato Tejas barrios. Located within Candelaria barrio, PR-863 extends to the south from PR-2 junction to PR-819 intersection. Then, it turns to the southeast through southeastern Candelaria until its terminus at PR-862 junction on the Toa Baja's southernmost point.
Prior to its numerical designation, PR-863 was only known as . The current numerical designation corresponds to the 1953 Puerto Rico highway renumbering, a process implemented by the Puerto Rico Department of Transportation and Public Works () that increased the insular highway network to connect existing routes with different locations around Puerto Rico.