Karl Leander Ikonen (14 October 1860, Joroinen - 27 April 1918, Viipuri) was a Finnish architect and politician.
He was a member of the Parliament of Finland from 1916 to 1917, representing the Finnish Party.
In 1918, during the Finnish Civil War, being a prominent supporter of the White side, he was arrested by Red Guards and shot in Viipuri on 27 April 1918, as White troops were preparing to storm the city.