Spanning over an area of about three sq km, Valvachagostam (also spelt Valvaithankoshtam) is a small settlement in Kanyakumari District, Tamil Nadu. Pudukadai is situated in the west, Unnamalaikadai in the north, Kappiyarai in the south and Killiyur in the south-west. Nearby tourist spots include Kuzhithurai, Kollemcode, Colachel Port, Thengapattinam, Thiruvattar, Sanguthurai Beach, Manavalakurichi, Muttam and Padmanabhapuram Palace.
Accommodation facilities are available at Nagercoil. Trivandrum International Airport is the nearest airport. Kuzhithurai Railway Station serves the town. Valvachagostam is connected to Thiruvananthapuram and Nagercoil by road.