"Bengawan Solo" (lit. "Solo River") is an Indonesian song about the Solo River, written by Gesang Martohartono in 1940. The song is a description of the longest river in Java, Solo River. The song became popular in Indonesia in the Second World War and was one of the songs promoted nationally in the newly-independent country after the war.
The song is the first song in Bahasa Indonesia written by an Indonesian to achieve widespread popularity in Indonesia as well as in Japan, other Far East and Southeast Asian countries. Many versions of the songs in different languages exist.
