| Country: | PHL |
| Marker Image: | |
| Sorsogon Diversion Road | |
| Alternate Name: | Salvador H. Escudero III Diversion Road |
| Length Km: | 7.445 |
| Length Ref: | [1] |
| Maint: | Department of Public Works and Highways – Sorsogon 1st District Engineering Office |
| Allocation: | |
| Direction A: | West |
| Junction: | |
| Direction B: | East |
| Provinces: | Sorsogon |
| Cities: | Sorsogon City |
| Previous Type: | N |
| Previous Route: | 642 |
| Next Type: | N |
| Next Route: | 644 |
Sorsogon Diversion Road, officially known as Salvador H. Escudero III Diversion Road,[2] is a 7.4adj=onNaNadj=on, national secondary road in the city of Sorsogon of the Sorsogon province in the Philippines.[3] Its official name, enacted in 2018, derives from Salvador Escudero III, who served as the province's 1st district representative and the country's agriculture secretary.
The entire road is designated as National Route 643 (N643) of the Philippine highway network.
Like most of the diversion roads in the country, the road bypasses the city proper of Sorsogon as an alternate route of Maharlika Highway, which goes straight to the city proper.
From the west: