Petrus "Piet" Gerardus Ikelaar (2 January 1896, in Nieuwer Amstel – 25 November 1992, in Zaandam) was a track cyclist from the Netherlands. He represented the Netherlands at the 1920 Summer Olympics. At his first appearance he won bronze medals in the 50 km track race and the 2000m tandem competition, alongside Frans de Vreng.