Belgrade City Library, Public library in central Belgrade, Serbia.

The Belgrade City Library occupies the Serbian Crown (Srpska kruna) building at Knez Mihailova 56, a structure protected as a cultural monument since 1981. Its network includes 13 municipal libraries and about 70 facilities across Belgrade, covering 13,000 square metres. The central building houses the Special Collections Department, with over 20,000 old and rare books and books about Belgrade, and the "Čika Jova Zmaj" Children's Department.

The library was founded in 1931, starting as a small reading room with a limited collection. Over the decades it grew into the capital's primary literary institution and evolved into a modern facility with digital resources.

The library's children's department, named after the poet Jovan Jovanović Zmaj, has run projects such as "Secret", awarded first prize at Biblionet 2009 as the best library project in Serbia for 2006–2009. The library also publishes books on Belgrade, including translations of 19th-century foreign travel accounts and a collection of short stories about the city.

The headquarters at Knez Mihailova 56 sits in the pedestrian zone, next to a shopping mall, in the building called Serbian Crown. The network runs about 70 facilities over roughly 13,000 m², including 13 municipal libraries with their branches, two separate children's departments and three service points. The Čika Jova Zmaj children's department holds around 30,000 items.

The library is connected through a digital network with other libraries in the region, allowing visitors to access an even larger collection. This networking means readers can search and request materials from multiple facilities without being limited to one location.