KK, K.K., kK, k.k., or other sequences of two k's with or without punctuation may refer to:
KK Crvena zvezda (Serbian Cyrillic: КК Црвена звезда, English: BC Red Star) is a professional basketball club based in Belgrade, the major part of the Red Star multi-sports club.
KK Partizan (Serbian Cyrillic: КК Партизан) is a Serbian professional basketball club based in Belgrade.
Krishnakumar Kunnath (born 23 August 1968), popularly known as KK, K.K. or Kay Kay, (Hindi: केके, is an Indian singer.
KK MZT Skopje Aerodrom (Macedonian: КК МЗТ Скопје Аеродром) is a basketball club based in Skopje, Republic of Macedonia.
KK Bosna Royal (Bosnian: Košarkaški klub Bosna Royal) is a professional basketball team based in Sarajevo, Bosnia and Herzegovina, which became European champion by winning the 1978–79 FIBA European Champions Cup.
KK Split is a Croatian professional basketball club from Split that plays in the Croatian A-1 Liga.
Košarkaški klub Partizan is a professional basketball club based in Belgrade, Serbia that competes in the Basketball League of Serbia, Adriatic League and Euroleague.
Košarkaški klub Cibona (English: Basketball Club Cibona), commonly known as Cibona Zagreb, is a professional basketball club based in Zagreb, Croatia.
KK Budućnost (pronounced [budǔːtɕnoːst]), currently known as Budućnost Voli for sponsorship reasons, is a professional basketball club from Podgorica, Montenegro.