Sidek is a surname or patronym. Notable people with the name include:
Khadijah Sidek (1918–1982), Malay nationalist and politician The Sidek brothers, a Malaysian family with a significant history within professional badminton: Misbun Sidek (born 1960), Malaysian badminton player Razif Sidek (born 1962), Malaysian badminton player and coach Jalani Sidek (born 1963), Malaysian badminton player and coach Rahman Sidek (born 1968), Malaysian badminton player and coach Rashid Sidek (born 1968), Malaysian badminton player and coach