The 2017–18 Basketball League of Serbia (Serbian: 2017–18 Košarkaška liga Srbije) is the 12th season of the Basketball League of Serbia, the highest professional basketball league in Serbia.

It is also 74th national championship played by Serbian clubs inclusive of nation's previous incarnations as Yugoslavia and Serbia & Montenegro.

Napredak Rubin who competed in the BLS during the last season changed the tier with KKK Radnički.

By approval from Basketball Federation of Serbia, Napredak moved to the 3rd-tier First Regional League (West).

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