Sa'id ibn Uthman

Sa'id ibn Uthman ibn Affan al-Umawi (Arabic: سَعِيد بْنُ عُثْمَانُ بْنُ عَفَّان الأُمَوِيّ, romanized: Saʿīd ibn ʿUthmān ibn ʿAffān al-Umawī; died c. 680) was an Umayyad general and military governor of Khurasan in 676–677 during the reign of Caliph Mu'awiya I. He was a son of Caliph Uthman (r. 644–656) and a one-time seeker of the caliphate in 675/76.

During his short term in Khurasan, he launched a campaign deep into Transoxiana and defeated one or two Soghdian armies. He reportedly captured Bukhara and besieged Samarkand, gaining tributary status from the latter, before proceeding to capture Tirmidh. He was dismissed by Mu'awiya, possibly due to concerns that his popularity and battlefield successes had strengthened Sa'id's previous bid to seek the caliphate instead of Mu'awiya's designated successor, Yazid I (r. 680–683). He was killed in Medina by his Soghdian slaves.