Ilkka is a masculine Finnish given name. Notable people with the name include:
Ilkka Alanko (born 1969), Finnish musician
Ilkka Hakalehto (1936–2009), Finnish historian and politician
Ilkka Hanski (born 1953), scientist and ecologist at Helsinki University, Finland
Ilkka Heikkinen (born 1984), Finnish professional ice hockey defenceman
Ilkka Heilä (born 1956), Finnish cartoonist who lives in Kaarina
Ilkka Jääskeläinen (born 1979), singer who won Idols Finland 2 (Finnish Pop Idol)
Ilkka Kanerva (born 1948), member of the Finnish Parliament
Ilkka Koski (born 1928), former Finnish boxer
Ilkka Kuusisto (born 1933), Finnish composer of popular opera; father of Jaakko Kuusisto
Ilkka Laitinen (born 1962), Finnish politician
Ilkka Lipsanen (born 1942), also known as Danny, Finnish singer and guitarist
Ilkka Mäkelä (born 1963), Finnish football manager and former player
Ilkka Mesikämmen (born 1943), retired professional ice hockey player
Ilkka Mikkola (born 1979), professional ice hockey player
Ilkka Niiniluoto (born 1946), Finnish philosopher, mathematician, professor of philosophy at the University of Helsinki
Ilkka Nummisto (born 1944), Finnish sprint canoeist
Ilkka Pikkarainen (born 1981), Finnish ice hockey right winger
Ilkka Remes (born 1962), Finnish author of thrillers and young adult literature
Ilkka Sinisalo (born 1958), former professional ice hockey player
Ilkka Suominen (born 1939), Finnish politician from the National Coalition Party
Ilkka Talvi (born 1948), Finnish violinist
Ilkka Tuomi (born 1958), native of Finland, is noted for writings on the subject of the Internet
Ilkka Vartiovaara (1946–2010), Finnish medical doctor, author, editor, artist and columnist
Ilkka Villi (born 1975), Finnish actor