Aleksander Mikołajczak (b. 1953) is a Polish voice actor who dubs Big Bird on Ulica Sezamkowa and other productions, and was also heard as Prince Charming and others in Świat Elmo (Elmo's World).

Mikołajczak's animation dub credits include Huckleberry Hound in various Hanna-Barbera productions, Wildcat on TaleSpin, Hamton J. Pig on Tiny Toon Adventures, and John Jameson on Spider-Man. Live action dubbing credits include Ron Cook in Thunderbirds and additional voices in The Stepford Wives. His on-camera roles include a guest spot on the Polish TV remake of The Nanny.