| State: | PR |
| Type: | PR |
| Route: | 647 |
| Alternate Name: | Spanish; Castilian: Carretera Palmira Cabrera de Ibarra |
| Length Km: | 12.8 |
| Established: | 1953 |
| Direction A: | South |
| Terminus A: | in Padilla–Cibuco |
| Junction: |
|
| Direction B: | North |
| Terminus B: | in Vega Alta barrio-pueblo |
| Municipalities: | Corozal, Vega Alta |
| Previous Type: | Ter |
| Previous Route: | 633 |
| Next Type: | Ter |
| Next Route: | 679 |
Puerto Rico Highway 647 (PR-647) is a north–south road located between the municipalities of Corozal and Vega Alta in Puerto Rico. With a length of 12.8km (08miles), it extends from its junction with PR-159 and PR-5568 on the Cibuco–Padilla line in western Corozal, passing through Cienegueta, Candelaria and Bajura barrios until its end at PR-676 in downtown Vega Alta.
Puerto Rico Highway 647 is mostly a rural road with one lane per direction for its entire length. In Corozal, it has a short length that extends from PR-159 and PR-5568 intersection to the Vega Alta municipal limit and is located entirely within Cibuco barrio. In Vega Alta, PR-647 has a long length, beginning from the Corozal municipal limit and ending at PR-676 in the city center. In this municipality, it crosses Cienegueta, Candelaria and Bajura barrios. PR-647 also crosses the Río Cibuco, and some portions of the Vega State Forest are located on this highway. On 17 March 2022, this road was renamed as Spanish; Castilian: Carretera [[Palmira Cabrera de Ibarra]] the in honor of the politician from Vega Alta.
Prior to its numerical designation, PR-647 was only known as Spanish; Castilian: Carretera de Candelaria. 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.