KK Proleter Zrenjanin
|Leagues||Serbian League B|
|History||KK Proleter Zrenjanin
|Team colors||Red, White
|Head coach||Slobodan Srezovski|
|Championships||1 National Championship|
KK Proleter Zrenjanin (Cyrillic: КК Пролетер Зрењанин) is a professional basketball club from Zrenjanin, Serbia. They currently participates in the Basketball League of Serbia B. The club is also known as Proleter Naftagas due to sponsorship reasons.
Formed in 1947, they immediately became one of the leading clubs in the former Yugoslavia. In 1948, just one year after its establishment, the club won second place in the national championship. They also finished runners-up in 1952 and 1955, before finally won the national title in 1956.
- Winners (1): 1956
- Runners-up (4): 1948, 1952, 1955, 1957