Nogometni Klub Istra (), commonly referred to as NK Istra or simply Istra, is a Croatian football club based in the city of Pula. The club currently plays in the fifth level of the Croatian league system, but Istra has also played in the Prva HNL (1991âÂÂ1997 and 1999âÂÂ2000). Istra was founded in 1961 from a merger of NK Pula and NK Uljanik.