Jacek Tadeusz Morajko (born 26 April 1981) is a Polish former road racing cyclist, who rode professionally between 2003 and 2018 for the Antarte–Rota dos Móveis, Madeinox–Boavista, Mróz–Active Jet, Vacansoleil–DCM, CCC–Polsat–Polkowice (two spells) and Wibatech Merx 7R teams. He now works as a directeur sportif for UCI Continental team Voster Team.

Born in Opole, Morajko made his professional debut in 2003 for the team Antarte–Rota dos Móveis. In 2007, he was finished second at the Polish National Road Race Championships. Three years later, he won the road race and also two stages and the general classification of the Course de la Solidarité Olympique and the Tour of Małopolska. In 2011, he won the Coupe des Carpathes.

In 2008, he finished 54th at the road race of the 2008 Summer Olympics in Beijing.