Oia (
Greek: Οία, pronounced
[ˈi.a]) is a
community on the islands of Thira (
Santorini) and
Therasia, in the
Cyclades,
Greece. The population was 1,230 inhabitants at the 2001 census, and the land area is 19.449 km
2. The population and land area are distributed as follows: 962 persons on 10.150 km
2 in Santorini, and 268 persons on 9.299 km
2 in Therasia. The community shares the island of Thira with the Municipality of Thira (Santorini), and is centered in the northwesternmost part of the island.