Ios

Ios
Ίος, Νιός
Clockwise from top: Church of Saint Irene, Odysseas Elytis Theatre, Cathedral Church Of Ios, Chora Hill, Windmills in Chora
Ios
Coordinates: 36°43′0″N 25°20′11″E / 36.71667°N 25.33639°E / 36.71667; 25.33639
CountryGreece
Administrative regionSouth Aegean
Regional unitThira
Municipality established1835
SeatChora
Government
 • MayorGkikas Gkikas
Area
 • Municipality
109.0 km2 (42.1 sq mi)
Highest elevation
713 m (2,339 ft)
Lowest elevation
0 m (0 ft)
Population
 (2021)
 • Municipality
2,299
 • Density21.09/km2 (54.63/sq mi)
Demonym(s)Ιήτης (Iitis) (official)
Ιέτης (Ietis) (Ancient Alternative)
Νιώτης (Niotis) (local)
Iitian or Ietian(anglicised)
Time zoneUTC+2 (EET)
 • Summer (DST)UTC+3 (EEST)
Postal code
840 01
Area code22860
Vehicle registrationEM
Websiteios.gr

Ios, (also spelled Io or Nio; Greek: Ίος, Greek pronunciation: [ˈi.os]; Ancient Greek: Ἴος [í.os]; locally Nios, Νιός) is a Greek island in the Cyclades group in the Aegean Sea. The island is largely hilly, with cliffs descending steeply to the sea on most sides. It is situated halfway between Naxos and Santorini. Ios measures about 18 kilometres (11 miles) in length and 10 kilometres (6 miles) in width, and covers an area of 109.024 square kilometres (42.094 sq mi). Its population was 2,299 in the 2021 census (down from 3,500 in the 20th century). Ios is part of the Thira regional unit.