Mary Nzimiro, nke aha ọmụmụ ya bụ Mary Nwametu Onumonu, (1898–1993) bụ onye ọchụnta ego nwaafọ Naịjirịa, onye ndọrọ ndọrọ ọchịchị na onye na-akwado ụmụ nwanyị. N’afọ 1948, a họpụtara ya dika onye nnọchi anya onye isi ụlọ ọrụ United Africa Company (UAC) maka mpaghara Ọwụwa Anyanwụ Naịjirịa, ebe ọ na-edozigharị ebe a na-ere akwa na ihe ịchọ mma nke ya na Port Harcourt, Aba na Owerri . Ka ọ na-erule mbido 1950, o sooro na ndị kacha baa ọgaranya na West Afrika, bụrụ onye nanị ya bi na Bernard Carr Street na Port Harcourt. N'elu ndọrọ ndọrọ ọchịchị, ọ bụ onye otu National Council of Nigeria na Cameroons, bụrụ onye otu kọmitii onye isi ya na 1957 na osote onye isi nke NCNC Estern Women Association na 1962. Oge a lụrụ agha obodo na Nigeria (1967–1970), ọ haziri ụmụnwaanyị Igbo ka ha kwadoo ndị Biafra. N’ihi nke a ihe niile o nwere lara n’iyi na Port Harcourt wee lawa n’obodo ya bụ Oguta ebe ọ nwụrụ n’afọ 1993.