Östergötland County in the context of "Östergötland"

Län (Swedish, IPA: [ˈlɛːn] ), len (Danish, IPA: [leːn]), lääni (Finnish, IPA: [ˈlæːni]) and len (Norwegian, IPA: [leːn]) refer to the administrative divisions used in Sweden and previously in Denmark, Finland and Norway. The provinces of Finland were abolished on 1 January 2010. In Norway, the term was in use from 1308 and in Denmark from the beginning of the 13th century. As of 19 February 1662 the len of Denmark-Norway were converted into amt.

They are also sometimes used in other countries, especially as a translation of the Russian word volost. During the period when Finland was a part of the Russian Empire (1809–1917), when Russian was made an official language alongside Swedish, it was synonymous with the word guberniya.

Örebro County (Swedish: Örebro län) is a county or län in central Sweden. It borders the counties of Västra Götaland, Värmland, Dalarna, Västmanland, Södermanland and Östergötland. It is frequently culturally divided into the hilly northern region of Bergslagen, where mining and metallurgic industry have been important since the Middle Ages, and the southern Mälardalen of lakes and farms.

Södermanland County (Swedish: Södermanlands län, [ˈsøːdɛrmanland lɛːn]) is a county or län on the southeast coast of Sweden. In the local Sörmlandic dialects it is virtually universally shortened and pronounced as Sörmlands län, or simply Sörmland, which is the dominant pronunciation and spelling inside the county. For example, the name of the local regional council is Region Sörmland. Södermanland's capital is Nyköping and the largest settlement is Eskilstuna. In the sparsely populated interior, Katrineholm is the largest locality. In total, Södermanland has nine municipalities and about 300,000 inhabitants.

Södermanland borders the counties of Östergötland, Örebro, Västmanland, Uppsala, Stockholm and to the Baltic Sea. It holds the popular camping route called "Sörmlandsleden" which is a system of trails covering a total of approximately 100 mil (1000 km) of walking paths in Södermanland. The county has shorelines on Sweden's third and fourth largest lakes of Mälaren and Hjälmaren. There are also numerous large lakes in the Nyköpingsån river system through the west and centre of the county.

Kalmar County (Swedish: Kalmar län) is a county or län in southern Sweden. It borders the counties of Kronoberg, Jönköping, Blekinge and Östergötland. To the east in the Baltic Sea is the island Gotland.

The counties are mainly administrative units. Geographically Kalmar County covers the eastern part in the Småland province, and the entire island of Öland.

Ydre Municipality (Swedish: Ydre kommun) is a municipality in Östergötland County, southeast Sweden. The municipal seat is located in the town of Österbymo.

The municipality was created through the local government reform of 1952, when six former entities were united. The name was taken from the old Ydre Hundred. Its area remained unchanged by the reform of 1971.