Riek is a surname and given name. Notable people with the name include:
As a given name Riek Schagen (1913–2008), Dutch actress and painter Riek Machar (born 1953), South Sudanese politician Riek Gai Kok, South Sudanese politician
As a surname Edgar Riek (1920–2016), Australian entomologist Gustav Riek (1900–1976), German archaeologist Sarah-Lorraine Riek (born 1992) German actress and model
See also
Reik (surname)