This is a timeline of the history of Port Harcourt, the capital of Rivers State, Nigeria.
19th century
1869 – A civil war in the Bonny Kingdom splits the polity into rival houses; Jaja leads the Opobo (Opubo) group to found Opobo at the Imo River estuary, reshaping trade routes across the Bonny–Imo river corridor near the future Port Harcourt area.[1][2]
1884–1885 – Britain proclaims the Oil Rivers Protectorate over the Niger Delta (confirmed in the wake of the Berlin Conference), extending consular jurisdiction over the Bonny River approaches and adjacent creeks.[3][4]
1893 – The Oil Rivers Protectorate is renamed the Niger Coast Protectorate, consolidating British administration across the eastern Niger Delta prior to amalgamation into Southern Nigeria in 1900.[5][6]
20th century
Port Harcourt in the 1930s
1925 – Braithwaite Memorial Hospital (now Rivers State University Teaching Hospital) begins operating.[7]
1961 – Roman Catholic Diocese of Port Harcourt established.[8]
1965 – Port Harcourt Refining Company founded at Alesa-Eleme.[9]