Oumarou Sidikou (1937? – 5 ga Afrilu, 2005 ) ɗan siyasan Nijar ne. Ya kasance Mataimakin Gwamnan Babban Bankin na Afirka ta Yamma (BCEAO) daga 1988 zuwa 1993. Ya kasance memba na jam'iyyar National Movement for the Development of Society (MNSD) kuma, bayan zaɓen majalisar dokoki na watan Janairun 1995, wanda kawancen da ya haɗa da MNSD ya lashe, an naɗa Sidikou a matsayin Ministan Jiha mai kula da Masana'antu Ci gaba, Kasuwanci, Masana'antu, da yawon buɗe ido a gwamnatin Firayim Minista Hama Amadou a ranar 25 ga Fabrairu, 1995. An tumbuke wannan gwamnatin a wani juyin mulkin soja a ranar 27 ga Janairu, 1996. Sidikou shi ne mahaifin Fatouma, Aïssa, Aboubakar, Hadizatou, Balkissa, Amadou, Ali, Rokhaya da Mohamed. An zaɓi Sidikou ga Majalisar Dokoki ta kasa a zaɓen majalisar dokoki na Nuwamba Nuwamba 1999 a matsayin dan takarar MNSD a Sashen Tillabéri, kuma a cikin wa’adin majalisar da ya biyo baya ya yi aiki a matsayin Shugaban ƙungiyar MNSD ta Majalisar Wakilai da Shugaban Hukumar Kudi.