Teluk Dalam (also written as Telukdalam) is a town and district in the South Nias Regency, North Sumatra province, Indonesia.
Telukdalam port came about after the original port in the south of Nias Island was in Teluk Lagundri (Lagundri Bay), further to the west along Nias's south coast.
In 1883, the resulting tsunami from the Krakatau volcano in the Sunda Strait between Sumatra and Java washed the original Teluk Lagundri trade village away.
The trade village was moved to the present position in Teluk Dalam.
On 28 March 2005, the 2005 Nias–Simeulue earthquake destroyed many ancient sites and many people were killed.