Raymond Koned Kalla Nkongo (born 22 April 1975), known as Kalla, is a Cameroonian retired footballer who played as a central defender.
His main asset was a powerful physique, and he had already been picked by the Cameroonian national team for three World Cups – and started – in his mid-20s.
During 15 years as a professional, Kalla played in five countries for six clubs.