Gantiadi (Georgian: განთიადი [ɡantʰiadi] ^ⓘ; Russian: Гантиади), or Tsandrypsh (Abkhaz: Цандрыҧшь; Russian: Цандрыпш), is an urban-type settlement on the Black Sea coast in Georgia, in the Gagra District of Abkhazia, 5 km from the Russian border.

Gantiadi in historical times, was known as Sauchi (Russian: Саучи). Then, until 1944 as Yermolov, after the Russian general Aleksey Petrovich Yermolov. From 1944 until 1991, the settlement was known as Gantiadi (Georgian: განთიადი, Russian: Гантиади), from the Georgian word for Dawn. After the 1992-93 war in Abkhazia, Gantiadi was renamed as Tsandrypsh by the de facto government, but the name Gantiadi is still used informally among Abkhazians and widely in other languages. The name Tsandrypsh derives from the princely family Tsanba.

Gantiadi is said to have been the historical capital of the principality of Saniga before the 6th century AD. It later became the capital of Sadzen.

In 2011, Gantiadi had a population of 5,170. Of these, 55.9% were Armenians, 19.6% Abkhaz, 18.4% Russians, 1.2% Ukrainians, 0.9% Georgians and 0.7% Greeks.

Tsandrypsh houses a 6th-century Georgian Christian church. A personal residence of Joseph Stalin is also located here.^{[citation needed]}