The name Romže is derived from the Old High German word runsa, which meant 'bed of the brook'.

[1] The lower course of the river (after the confluence with the Hloučela in Prostějov) is often called Valová.

[3] The longest tributaries of the Romže are:[4] The most notable settlement on the river is the city of Prostějov.

The river flows through the municipal territories of Dzbel, Jesenec, Konice, Budětsko, Stražisko, Ptení, Zdětín, Hluchov, Bílovice-Lutotín, Kostelec na Hané, Držovice, Smržice, Prostějov, Kralice na Hané, Bedihošť, Čehovice, Hrubčice, Čelčice, Ivaň, Klenovice na Hané, Oplocany, Polkovice, Lobodice and Uhřičice.

The largest of them is Plumlov Reservoir with an area of 54.8 ha (135 acres), built on the Hloučela.