King Mswati II (c. 1820 – August 1868), also known as Mswati and Mavuso III, was the king of Eswatini between 1840 and 1868. He was also the eponym of Eswatini. Mswati is considered to be one of the greatest fighting kings of Eswatini.
Under his kingship, the territorial boundaries of Eswatini were greatly increased. Mswati was the son of Sobhuza I and Tsandzile Ndwandwe (known as "LaZidze") who after ruling as Queen Mother became Queen Regent after the death of her son. After the death of Sobhuza, Mswati inherited an area which extended as far as present day Barberton in the north and included the Nomahasha district in the Portuguese territory of Mozambique.