Iddefjord ( or Idde Fjord; ); ) is a classic

fjord In physical geography, a fjord (also spelled fiord in New Zealand English; ) is a long, narrow sea inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Antarctica, the Arctic, and surrounding landmasses of the n ...

with a narrow watercourse and steep natural formations on both sides. It runs along the Norwegian-Swedish border from the Singlefjord ().''A Brief Geographical and Hydro Graphical Study of Bays and Estuaries the Coasts of which Belong to Different States''. 2009. Geneva: United Nations, p. 218. The Iddefjord separates the province of

Bohuslän Bohuslän () is a Provinces of Sweden, Swedish province in Götaland, on the northernmost part of the country's west coast. It is bordered by Dalsland to the northeast, Västergötland to the southeast, the Skagerrak arm of the North Sea to the ...

in the county of Västra Götaland in

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

from the municipality of

Halden Halden (), between 1665 and 1928 known as Fredrikshald, is both a List of cities in Norway, town and a Municipalities of Norway, municipality in Østfold Counties of Norway, county, Norway. The municipality borders Sarpsborg to the northwest, R ...

in the county of

Østfold Østfold () is a county in Eastern Norway, which from 1 January 2020 to 31 December 2023 was part of Viken. Østfold borders Akershus and southwestern Sweden (Västra Götaland County and Värmland), while Buskerud and Vestfold are on the other ...

Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...

. It opens to the

Skagerrak The Skagerrak (; , , ) is a strait running between the North Jutlandic Island of Denmark, the east coast of Norway and the west coast of Sweden, connecting the North Sea and the Kattegat sea. The Skagerrak contains some of the busiest shipping ...

via the

Svinesund Svinesund is a sound separating the Swedish municipality of Strömstad in the province of Bohuslän in the county of Västra Götaland from the Norwegian municipality of Halden in the county of Østfold. Two bridges, the old and new Svinesun ...

and

Hvaler Hvaler is a municipality that is a group of islands in the southern part of Østfold County, Norway. The administrative centre of the municipality is the village of Skjærhalden, on the island of Kirkeøy. The only police station in the munici ...

archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands. An archipelago may be in an ocean, a sea, or a smaller body of water. Example archipelagos include the Aegean Islands (the o ...

(a cluster of classic

skerries A skerry is a small rocky island, usually defined to be too small for habitation. Skerry, skerries, or The Skerries may also refer to: Geography Northern Ireland *Skerries, County Armagh, a List of townlands in County Armagh#S, townland in Coun ...

). The outermost stretch is called the Ringdalsfjord (),Hyde, Robert. 1979. The Sparks Flew in Sweden. ''Cruising World'' (January): 92–93. but from the point where it makes a sharp bend and further south, it is called the Iddefjord. Like several other fjords, it was named after a part of its coast, in this case the parish of Idd.

References

Fjords of Østfold Halden Fjords of Sweden Norway–Sweden border International fjords Landforms of Västra Götaland County {{Norway-fjord-stub