Kammala wannan jumla: An kafa bankin ne a shekarar 1966, da farko a matsayin hadin gwiwa. An ba da lasisin banki a cikin 1968. Gwamnatin Kenya ta umarci dukkan kamfanonin hadin gwiwa a kasar da su tura ajiyar su zuwa bankin hadin gwiwar Kenya kuma dukkan kamfanonin hadin gwiwar su sayi hannun jarin bankin. A cikin 1977, bankin ya buɗe rassa na farko: Co-operative Finance Limited. A cikin 1989, bankin ya canza zuwa cikakken banki na kasuwanci kuma ya ƙara menu na samfurori. A shekara ta 1998 an sake mayar da hedkwatar bankin bayan da aka lalata gine-ginen da aka yi a baya.
harin bam da aka kai kan ofishin jakadancin Amurka da ke kusa. A wannan shekarar, bankin ya zama wakili na kamfanin sabis na canja wurin kuɗi MoneyGram. A shekara ta 2002, hedkwatar bankin ta koma gidan Bankin Bankin bayan gyare-gyare. A shekara ta 2008, bankin da aka jera a Nairobi Securities Exchange, inda hannayen jarinsa ke kasuwanci a karkashin alamar: COOP.