Oberallgäu in the context of Unterallgäu

Ravensburg is a Landkreis (district) in the southeast of Baden-Württemberg, Germany. Neighboring districts are (from southwest clockwise) Bodensee, Sigmaringen and Biberach, the Bavarian urban district Memmingen and the districts Unterallgäu, Oberallgäu and Lindau.

Lindau is a Landkreis (district) in Swabia, Bavaria, Germany; its capital is the city of Lindau. It is bounded by (from the east and clockwise) the district of Oberallgäu, Austria (federal state of Vorarlberg), Lake Constance and the state of Baden-Württemberg (districts of Bodensee and Ravensburg).

The Wertach (German pronunciation: [ˈveːɐ̯tax]) is a river in Bavaria, southern Germany. This 141 km (88 mi) long river is a left tributary of the Lech. The Wertach originates in the Northern Limestone Alps in Bad Hindelang, east of Sonthofen (district Oberallgäu). It flows north along the towns Wertach, Nesselwang, Marktoberdorf, Kaufbeuren, Schwabmünchen and Bobingen. The Wertach flows into the Lech (itself a tributary of the Danube) in Augsburg, and has a deep reservoir with a hydroelectric power plant.

Ostallgäu (German pronunciation: [ˈɔstˌʔalɡɔʏ]) is a Landkreis (district) in Swabia, Bavaria, Germany. It is bounded by (from the west and clockwise) the districts of Oberallgäu, Unterallgäu, Augsburg, Landsberg, Weilheim-Schongau and Garmisch-Partenkirchen, and by the Austrian state of Tyrol. The town of Kaufbeuren is enclosed by but does not belong to the district.