Major General (Ret.) Joseph Saidu Momoh (January 26, 1937 – August 3, 2003) was the President of Sierra Leone from November, 1985 to April 29, 1992.

Joseph Saidu Momoh was born on January 26, 1937 in Binkolo, Bombali District in the Northern Province of Sierra Leone to Limba Parents. He married to a Fullani woman from Kono Mrs Fatmata N. Momoh years after the first lady Hannah Momoh died in the Republic of Guinea.

Momoh served as President of Sierra Leone from November 28, 1985 to April 29, 1992. A professional soldier drawn into politics, Momoh rose from the enlisted ranks, to the highest position in the Sierra Leone Military Forces (Major-General), during his presidency. In 1985 Momoh succeeded President Siaka Stevens by becoming the only candidate in a one-party election in the form of a referendum under the banner of the All People's Congress party (APC).

Momoh declared a state of economic emergency early in his rule, granting himself greater control over Sierra Leone's economy, but he was not regarded as a dictator. Instead, his people viewed him as far too weak and inattentive to the affairs of state, allowing his notoriously corrupt advisors to manipulate matters behind the scenes. Sierra Leone's economy gradually disintegrated under Momoh's rule, and the country's currency decreased in value. Sierra Leone reached the point under President Momoh where it could not afford to import gasoline and fuel oil, and the country went without electricity for months at a time. In September, 1991, after the start of the Sierra Leone Civil War, Momoh ushered in a new constitution, providing for a multi-party state and ending the single party rule Siaka Stevens initiated in the 1970s. He also played a great part in dissolving tribalism. But Momoh's efforts at reform came too late to rescue Sierra Leone from chaos.

Saidu is a town in Lhuntse District in northeastern Bhutan.