Naimbanna II (1720 – 11 November 1793) was Obai (King) of the Temne people of Sierra Leone.
Naimbanna had some variants of his name, such as Nemgbana, which may refer to a place called Gbana, with the suggestion that when asked what he was called the king replied "name Gbana".
In 1785 he sent his son Pedro to France.
In 1791 he sent his eldest son, John Frederick Naimbanna, to England where he came under the tutelage of Henry Thornton. While in London he became a Christian adopting the forenames Henry and Granville after Henry Thornton and Granville Sharp.