WHiiu County is one of 15 counties of Estonia, being the smallest county both in terms of area and population. It consists of Hiiumaa, 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.
WOperation Beowulf refers to two German plans to occupy the islands of Saaremaa, Hiiumaa and Muhu, off the Estonian west coast. Both plans had the same objectives but assumed differing start points. The attack, using Beowulf II, started on 9 September 1941 and had achieved its objectives by 21 October.
WKäina Bay is almost isolated and very shallow approximately 9 km2 (3.5 sq mi) marine area between the Estonian islands Hiiumaa and Kassari, which is connected to the surrounding Väinameri and adjacent Vaemla Bay via three tiny channels - Orjaku channel, Orjaku sill and Vaemla channel. The maximum depth of Käina Bay is about 1 meter. Käina Bay is separated from the Väinameri Sea by Kassari Island, Õunaku Bay and Jausa Bay by a dyke road. There are many thickets of reeds and islets (23). In the southern part of the bay there is mineral curative mud.
WKäina seamud deposit is a national mineral resource deposit in Estonia, Hiiu County, located in the western part of Käina Bay, Hiiumaa Island. In accordance to the Earth's Crust Act sea mud is a mineral resource in Estonia. Käina seamud deposit is one of 3 national seamud deposits in Estonia. The active reserve of the Käina seamud deposit in December, 2018 was 273,8 thousand tons and passive reserve 1 546,0 thousand tons.
WKõpu Peninsula is a peninsula on the island of Hiiumaa in Hiiu County, Estonia. The length of the peninsula is about 21 kilometres (13 mi).
WKõrgessaare Parish was a rural municipality in the north-west of Hiiu County, Estonia. In 2013 it was merged with the town of Kärdla to form a new Hiiu Parish.
WElectoral district no. 5 is one of the 12 multi-member electoral districts of the Riigikogu, the national legislature of Estonia. The district was established as electoral district no. 6 in 1992 when the Riigikogu was re-established following Estonia's independence from the Soviet Union. It was renamed electoral district no. 5 in 1995 following the re-organisation of electoral districts. It is conterminous with the counties of Hiiu, Lääne and Saare. The district currently elects six of the 101 members of the Riigikogu using the open party-list proportional representation electoral system. At the 2019 parliamentary election it had 51,093 registered electors.