The Tagaytay–Nasugbu Highway, alternatively known as Tagaytay–Nasugbu Road and formerly as Tagaytay–Tuy–Nasugbu Port Road, is a 43.86-kilometer (27.25 mi), two-to-four lane, secondary highway in the provinces of Cavite and Batangas, Philippines, that connects the city of Tagaytay in Cavite and the municipality of Nasugbu in Batangas.

It then runs to the west along the Tagaytay Ridge, eventually traversing the boundary of Alfonso, Cavite and Laurel, Batangas.

It then fully enters the province of Batangas, where it traverses north of Mount Batulao, the city of Calaca, and the towns of Nasugbu and Tuy.

According to the Department of Public Works and Highways, its segment from its eastern terminus at Tagaytay Rotonda to the eastern end of Mahogany Avenue, both in Tagaytay, is part of the Tagaytay–Manila via Silang Road, while its segment from there to Diokno Highway is officially named as Tagaytay-Batangas via Tuy Road; the rest of the highway is officially named as is.

[4] A new road that connects Tuy to the newly-established city of Tagaytay was later constructed in the 1930s and was made part of the highway.