Mohammad Umar Taj (born November 22, 1980) was a Pakistani cricketer. He was a left-handed batsman and a left-arm slow bowler. He was born in Lahore.
Umar made three appearances in the Tissot Cup for Pakistan Customs in April 1999, and despite helping guide the team to victory in the semi-final of the competition, did not participate in the final.
In the same season, Umar made five first-class appearances, one for Pakistan Customs and four for Lahore City.