Joséphine Mountou-Bayonne (June 28, 1929 – October 24, 2022) was a Congolese politician. She served in the Senate of the Republic of the Congo since its inception in 1992. 
Joséphine Mountou-Bayonne was born on June 28, 1929 in Djambala. She graduated with a degree in university administration in 1963.
She joined the National Movement of the Revolution in 1964 and was a founding member of the Congolese Party of Labour (PCT) in 1972. She served as a deputy in the National Assembly in 1973 to 1978. She became a Senator representing the Plateaux Department in 1992, serving until 1997 when her term was interrupted by the Republic of the Congo Civil War. She again served as a senator from 2002 until her death.
Mountou-Bayonne was a founder of the Revolutionary Union of Congolese Women (URFC) in 1965 and served as its president from 1974 to 1979.
Awards.
The awards Joséphine Mountou-Bayonne received include: