Omar El-Zein (born 12 August 1985 in Lebanon) is a German footballer.
After spending half a season with his first few clubs and scoring 65 goals in one season with amateurs Dostluk Spor Osterode, El-Zein decided to play professionally in Azerbaijan with FK Standard Sumgayit. However, he left after making 4 appearances and one goal due to a change in head coach, who only used local players. In 2010, El-Zein claimed that he regretted that move and that "it [Azerbaijan] was a waste of time".
In 2013, he signed for FSV Wacker 90 Nordhausen in the German Regionalliga, scoring 6 goals in 18 league appearances before playing for 3 more Regionalliga sides.
As a freestyler, El-Zein was nicknamed "Omardinho" after Brazilian international Ronaldinho and once came 2nd in a nationwide freestyle competition.