Mthonjaneni is an administrative area in the King Cetshwayo District of KwaZulu-Natal in South Africa. Mthonjaneni is an isiZulu name meaning "a spring of water". There is a spring found in the vicinity of the municipality where King Dingaan used to send his maidens to collect water for him. The municipality was enlarged at the time of the South African municipal election, 2016 when part of the disbanded Ntambanana Local Municipality was merged into it.