| Country: | PHL |
| Route: | 403 |
| Type: | N |
| Alternate Name: | Governor's Drive Trece Martires–Naic Road Dasmariñas–Trece Martires City–Naic Road |
| Image Notes: | N403 and its reasurrance sign in Trece Martires |
| Maint: | Department of Public Works and Highways (DPWH) - Cavite 1st District Engineering Office & Cavite 2nd District Engineering Office |
| Length Km: | 12.55 |
| Direction A: | East |
| Direction B: | West |
| Terminus A: | in Trece Martires |
| Terminus B: | Antero Soriano Highway, Sabang Road, and Governor's Drive in Naic, Cavite |
| Provinces: | Cavite |
| Towns: | Naic, Tanza |
| Cities: | Trece Martires |
| Previous Type: | N |
| Previous Route: | 402 |
| Next Type: | N |
| Next Route: | 404 |
National Route 403 (N403) forms part of the Philippine highway network. It runs through central Cavite.[1] [2] It connects the city of Trece Martires to the municipality of Naic.
See main article: Governor's Drive. The segment of Governor's Drive from its intersection with N64 (Tanza–Trece Martires Road) and N404 (Trece Martires–Indang Road) in the city proper of Trece Martires to its intersection with Antero Soriano Highway and Sabang Road in the town proper of Naic. It also passes through the municipality of Tanza in between.
This route is also known as Trece Martires–Naic Road and Dasmariñas–Trece Martires City–Naic Road.[3]