The Mano River Union (MRU) is an international association initially established between Liberia and Sierra Leone by the 3 October 1973 Mano River Declaration. It is named for the Mano River which begins in the Guinea highlands and forms a border between Liberia and Sierra Leone. On 25 October 1980, Guinea joined the union.
The goal of the Union was to "accelerate the economic growth, social progress and cultural advancement of our two countries ... by active collaboration and mutual assistance in matters of common interest in economic, social, technical, scientific and administrative fields". The staff numbered 600 in 1986, but was down to 300 in 1993, then to 120, and 48 in 2000. his successor was the first woman to hold that office: Dr Saran Daraba Kaba. The Mano River Union Secretariat is based in Freetown, Sierra Leone, with offices in Conakry, Guinea and Monrovia, Liberia. To date this idea has been shelved as the cost and the structure of another parliamentary body whose relevance remains to be appreciated.
Secretaries-General of the MRU
- Dr. Cyril A. Bright, Liberia (1974–1978)
- T. Ernest Eastman, Liberia (1978–1983)
- Dr. Augustus F. Caine, Liberia (1983–1987)
- Dr. Abdoulaye Diallo, Guinea (1988–2005)
- Abraham Boure, Guinea (2007–2010)
- Habib Diallo, Guinea (2010–2011)
- Dr. Hadja Saran Daraba Kaba, Guinea (2011–2017)
- Amb. Mrs. Medina A. Wesseh Esq, Liberia (2017–2022)
- Amb. Maria G. Harrison, Liberia (2022-2024)
- Amb. Mr. Simeon M-B. Moribah, Liberia (2024-)