| State: | PR |
| Type: | PR |
| Route: | 803 |
| Maint: | Puerto Rico DTPW |
| Length Km: | 10.2 |
| Direction A: | South |
| Terminus A: | in Cedro Arriba |
| Junction: |
|
| Direction B: | North |
| Terminus B: | in Palmarejo |
| Municipalities: | Naranjito, Corozal |
| Previous Type: | Ter |
| Previous Route: | 802 |
| Next Type: | Ter |
| Next Route: | 805 |
Puerto Rico Highway 803 (PR-803) is a north–south road that travels from eastern Corozal to southwestern Naranjito in Puerto Rico. With a length of 10.2km (06.3miles), it begins at PR-164 in Palmarejo barrio and ends at its junction with PR-152 and PR-802 in Cedro Arriba barrio.
Puerto Rico Highway 803 is a rural road with one lane in each direction along its entire length. In Corozal, it begins at PR-164 intersection, crossing Palmarejo and Palos Blancos barrios until the Naranjito municipal limit. In Palos Blancos, PR-803 climbs the Corozal mountains and meets with PR-808 and PR-805 near the Monte Choca State Forest. In Naranjito, it has a shorter length than in Corozal, located entirely within Cedro Arriba barrio, beginning from the Corozal municipal limit to its southern terminus at PR-152 and PR-802 intersection.
Prior to its numerical designation, PR-803 was only known as Spanish; Castilian: Carretera de Palos Blancos. 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 (Spanish; Castilian: Departamento de Transportación y Obras Públicas) that increased the insular highway network to connect existing routes with different locations around Puerto Rico.