With the aim of growth and development of the sport and improving the quality of football in Istria, NK Istra 1961 signed a cooperation agreement with many Istrian clubs.
Currently, a cooperation has been concluded with 9 Istrian clubs, which are:
NK VIŠNJAN
NK KAŠTELIR LABINCI
NK DINAMO MARIJA NA KRASU
NK BUZET
NK TAR
NK PETROVIJA
NK FUNTANA
NK ARNE-PERUŠKI
NK DAJLA
NK LIŽNJAN
NK MUNTIĆ
NK MARČANA
NK ISTRA PULA
NK ULJANIK
NK MLADOST FAŽANA
NK MEDULIN
NK GRBCI
ŠN VRATARI ISTRE