Geographys
Flag of GabonFlag of Republic of the Congo

Gabon–Republic of the Congo border

A long, winding line of rivers and watersheds from the Cameroon tripoint to the Atlantic, drawn loosely between two French colonies and never demarcated. Between 1925 and 1946 Gabon’s whole Haut-Ogooué district, around Franceville, was run as part of Middle Congo instead.

Written from cited sourcesLast checked 30 September 2026Suggest a correction

GABONREPUBLIC OF THE CONGOCAMEROONAtlantic OceanCameroon tripointFranceville
Today’s borderThe border winds from the Cameroon tripoint south around Gabon’s eastern side and west to the Atlantic.

See it on the globe:Gabon →Republic of the Congo →

A line inside French Equatorial Africa

France ran both Gabon and Middle Congo until independence in 1960, and the boundary between them was only an internal administrative line. It mostly follows rivers and watersheds but was never described in great detail during the colonial period, and it has never been demarcated on the ground.[1]

The line also moved. The Haut-Ogooué district of Gabon, with Franceville as its capital, was attached to Middle Congo by an arrêté of 15 April 1925, effective 1 July. It returned to Gabon by a decree of 16 October 1946 with its Franceville and Okondja subdivisions; the Zanaga subdivision, once part of the district, stayed with Congo.[2]

Unfinished business

From the 1970s the two governments noted several disputed areas, including their maritime frontier. In 2014 they signed a protocol setting up a joint commission to resolve them; its experts have met several times but have not yet completed a detailed delimitation or modern demarcation.[1]

Timeline

  1. 19251 July 1925

    Haut-Ogooué to Middle Congo

    Franceville’s district is run from Congo.[2]

  2. 194616 October 1946

    Back to Gabon

    The district returns, minus Zanaga.[2]

  3. 1960

    Independence

    The internal line becomes an international border.[1]

  4. 2014

    Joint commission

    A protocol sets up talks on disputed areas.[1]

More borders

Sources

  1. [1]
  2. [2]
    Haut-Ogooué, Circonscription (Gabon), place record (updated 21 August 2017) · Archives nationales d’outre-mer (France) · 21 August 2017

Map geometry from Natural Earth via world-atlas. See credits.

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