Willem "Wim" de Graaff (25 August 1931 – 12 January 2021) was a Dutch speed skater who competed in the 1956 Winter Olympics and in the 1960 Winter Olympics.

He was born and died in Rotterdam.

Four years later he finished 15th in the 1500 metres competition and 28th in the 500 metres contest at the 1960 Games.

He later became a famous skate coach and owner of a sportshop in Maassluis.

This biographical article about a speed skater from the Netherlands is a stub.