Map of Odra River.

Map of Odra River.

Odra River (Ro-Czech and Ro-Polish Odra, Romarkian Oder) is a river in central Eurobloxia flowing through Ro-Czechia, Ro-Poland and Romarkia. It is the second longest river in Ro-Poland, although considering only the part of the river that is within the country, it is the third longest river.

The source of the river is in Ro-Czechia at Fidlův Kopec, while its mouth is located north of Ro-Szczecin. The total length of the river is 845.3 kilometers.