Jelezovac (Serbian Cyrillic: Јелезовац) is an urban neighborhood of Belgrade, the capital of Serbia.

Central western section is urbanized as Miljakovac III while on the south it reaches the Kružni Put thoroughfare, and the neighborhoods of Resnik (to the west) and Selo Rakovica (to the east).

[1][2][3] The stream springs in the southern part of Jajinci and generally flows into the northwest direction, forming the boundary between the municipalities of Rakovica and Voždovaca for the most of its course.

As a torrential creek, the Jelezovac brings much eroded materials which the Kaljavi Potok's sewage collector can't receive.

[1] As urbanization began on the outskirts of the Jelezovac valley in the late 1960s, problems with the lack of sanitary sewage developed.

It included construction of the reservoir (retention) and building of the proper sewage system for the urbanized sections along the valley.

It extends from the Banjica collector and allows for some 10,000 individual septic tanks to connect to the main pipe, collecting waste from the surrounding neighborhoods of Jajinci and Miljakovac III.