Willem Aantjes, Dutch civil servant and politician (b. 1923)
Willem "Wim" Aantjes (Dutch pronunciation: [ˈʋɪləm ˈʋɪm ˈaːɲcəs]; 16 January 1923 – 22 October 2015) was a Dutch politician of the Christian Democratic Appeal (CDA).

Aantjes a jurist by occupation, was elected as a Member of the House of Representatives on 26 May 1959 after the general election of 1959. He served as the Parliamentary leader of the Anti-Revolutionary Party in the House of Representatives from 22 June 1971 until 30 November 1972, during the period when Barend Biesheuvel the Leader of the Anti-Revolutionary Party served as Prime Minister of the Netherlands. Aantjes became Leader of the Anti-Revolutionary Party and Parliamentary leader on 7 March 1973 and served until 25 May 1977 when the became the Parliamentary leader of the Christian Democratic Appeal in the House of Representatives of the Netherlands from 19 December 1977 until 7 November 1978 when he resigned both his positions.