Umar (full name Umar ibn al-Khattāb) was a companion of Muhammad and for the sunnis became the second Caliph (634 – 644); also known in English as Omar. Umar may also refer to:

Umar Tall - senedal politician

Umar (comics), the other-dimensional mother-in-law of Doctor Strange in the Marvel Universe

Umar (name), a variant of Omar, an Arabic name