Border rivers

The Körös-ér (Hungarian, also Kőrös-patak), Kireš or Kereš (), is a river in southern Hungary and northern Serbia, a right tributary to the Tisa river. It flows entirely within the Bačka border region: in Hungary, as a border river and in Serbia (roughly, as different authors give different data).

river in Honduras

river in Venezuela

river in Costa Rica

The Astarachay (, , ) is a small river that defines the eastern border between Iran and Azerbaijan in Western Asia.

river that divides Malawi and Tanzania

The Kirnitzsch (German), in Bohemia also called the Kirnischt, , is a right tributary of the River Elbe, which passes through the Czech Republic and the German state of Saxony.

watercourse in Guinea

organization established in 1948

river in South Sudan

river that runs through southern Gabon and northern Republic of the Congo

river in southern Guatemala

Anarjohka (, or Anarjohka, , ) is a tributary of Tana River. It is about long, with a drainage area of about . The mean discharge at the mouth is about . The lower part of the river runs along the Finnish–Norwegian border. The border continues along the Anarjohka's tributary Skiehččanjohka, while the upper part of the river lies within the eponymous Anárjohka national park in Norway.

river in western Africa

river in Ecuador and Colombia

The Studva () is a river in eastern Croatia and northern Serbia, a 37 km-long right tributary to the Bosut river. It flows entirely within the Syrmia region of both Croatia and Serbia (Vojvodina).

river in Guyana & Brazil

river in the United States of America

The Olef is a river in Liège, Belgium and North Rhine-Westphalia, Germany. It is long and a left-hand tributary of the Urft. It flows through the Eifel Mountains in the western part of the Germany and eastern part of Belgium.

river in Greece and Albania

river

The Wondreb (; called Nikolausbach upstream, ) is a river in Germany and the Czech Republic, a right tributary of the Ohře River. It flows through Bavaria and Karlovy Vary Region. It is long.

river of Bengal

river in Guyana and Brazil

river, tributary of Moselle River

river in west Africa

river

river in Bavaria and Vorarlberg, tributary of Brengenzer Ach

river in Colombia & Brazil

river and right tributary of the Danube

river in Argentina & Brazil

watercourse in Argentina/Brazil

The Vadakste () is a river in southern Latvia and northern Lithuania. It is a right tributary of the Venta River. The length is , of which over follow the Latvia–Lithuania border. The catchment area is . It originates near the city Auce, Latvia. It flows first in a southwest, and then in a westerly direction. It begins to flow along the border between Latvia and Lithuania from the village of Vegeriai. It flows into Venta at from its mouth, in the village of Griežė, northwest of Leckava.

river in Malaysia

river in Eritrea

The Leiblach is a tributary of Lake Constance (Obersee) and the Rhine, respectively. It forms the Austria–Germany border near the lake.

The Chamb () is a river in Germany and the Czech Republic, a right tributary of the Regen River. It flows through Bavaria and Plzeň Region. It is long.

river in Turkey

river

river in France

tributary of the Pacific Ocean in Peru and Ecuador

river

small tributary of the Coeroenie River in southern Suriname.

river in Democratic Republic of the Congo

river in South Sudan

river in Colombia

The Neualmbach, also called Neualpbach, is a river which lies in its entire course on the border between Bavaria, Germany and Tyrol, Austria, in the Ammergau Alps.

river in Turkmenistan

river in South America on the border of Brazil, Suriname and Guyana

river in El Salvador

watercourse in Democratic Republic of the Congo

The Stropnice () is a river in the Czech Republic and Austria, a right tributary of the Malše River. It originates in Lower Austria, but quickly leaves the territory of Austria and flows further through the South Bohemian Region. It is long.

river in Czech Republic

river in El Salvador

river in Democratic Republic of the Congo

river in Suriname and French Guiana

river in Belgium and France

river in the Czech Republic and in Germany

stream in North Rhine-Westphalia, Germany

river in Argentina and Bolivia