The Mokroluški potok (Serbian Cyrillic: Мокролушки поток) is a stream in north-central Serbia, which forms a 15 km-long former right tributary to the Sava river. During its entire concourse, it runs through the urban section of Belgrade. It is one of the 40 rivers, streams and creeks that flow or used to flow through Belgrade, but the majority of them are conducted underground into the city sewage system which is also the case with Mokroluški potok.