Hiiu is a subdistrict (Estonian: asum) in the district of Nõmme, Tallinn, the capital of Estonia. It covers an area of 2.50 km² (0.97 sq mi) and has a population of 3,891 (As of 1 June 2011 (2011 -06-01)^[update])., population density is 1,556/km² (4,031/sq mi).

Hiiu has a station on the Elektriraudtee western route. The first narrow gauge railway station was built to Hiiu in 1913.

Hiiu train station

Vabaduse puiestee, the main road of Nõmme District in Hiiu.

Grain elevator

Glehn's Castle

Mustamäe ski jumping hill

Nõmme St. John the Forerunner Orthodox Church

Coordinates: 59°23′01″N 24°40′19″E / 59.38366°N 24.671903°E / 59.38366; 24.671903

Hiiu County (Estonian: Hiiu maakond), or Hiiumaa, is one of 15 counties of Estonia, being the smallest county both in terms of area and population. It consists of Hiiumaa (German, Swedish: Dagö), the second largest island of Estonia, and several smaller islands near it. The county borders Lääne County to the east and Saare County to the south. 10,097 people live in Hiiu County – constituting 0.8% of the total population in Estonia (as of January 2009).

Human habitation of Hiiumaa can be traced back to the 5th millennium BC. Mesolithic sites in Kõpu peninsula are presented by the seal-hunters' settlements. There are several well preserved grave fields of the Iron Age. In 1228, the island was first mentioned in written annals under the name Dageida. In 1254, Hiiumaa was divided between the Livonian Order and the Bishopric of Ösel-Wiek. In 1563 Hiiumaa was annexed into Sweden. In 1710, as a result of the Great Northern War the island went under the control of the Russian Empire. During World War I, the German military forces occupied Hiiumaa in 1917. In 1918–1940 Hiiumaa was part of the Republic of Estonia, then until 1991 occupied by the Soviet Union.