| Caliph | Reign (CE) | Yrs | Father | Mother | Transliteration | العربية |
|---|---|---|---|---|---|---|
| The Rightly-Guided Caliphs1 | ||||||
| Abu Bakr | 632–634 | 2 | Abu QuhafaUthman ibn Amir | Umm al-KhayrSalma bint Sakhr | Abū Bakr al-Ṣiddīq | أبو بكر الصديق |
| Umar ibn al-Khattab | 634–644 | 10 | Al-Khattab ibn Nufayl | Hantamah bint Hisham | ʿUmar ibn al-Khaṭṭāb | عمر بن الخطاب |
| Uthman ibn Affan | 644–656 | 12 | Affan ibn Abi al-As | Arwa bint Kurayz | ʿUthmān ibn ʿAffān | عثمان بن عفان |
| Ali ibn Abi Talib | 656–661 | 5 | Abu Talib ibn Abd al-Muttalib | Fatima bint Asad | ʿAlī ibn Abī Ṭālib | علي بن أبي طالب |
| Hasan ibn Ali | 661 | <1 | Ali ibn Abi Talib | Fatima bint Muhammadthe Prophet’s daughter2 | Al-Ḥasan ibn ʿAlī | الحسن بن علي |
1 Unlike every dynasty elsewhere on this site, succession among the Rashidun caliphs was not hereditary. Abu Bakr was acclaimed at the Saqifah assembly after Muhammad’s death in 632; Umar was nominated by Abu Bakr on his deathbed and accepted by the community; Uthman was chosen by a six-man council (shura) that Umar appointed before his own assassination; Ali was acclaimed amid the civil unrest that followed Uthman’s murder. Parentage is recorded here because it is well attested, not because it explains who ruled next.
2 Hasan ibn Ali briefly held the caliphate after his father’s assassination but abdicated to Mu’awiyah I within months to end the First Fitna (civil war). Islamic historiography calls this the “Year of Unification” (ʿĀm al-Jamāʿah) — it closes the Rashidun period and opens the hereditary Umayyad Caliphate.
The conquest of Sasanian Iran falls almost entirely within this period: the decisive Arab victories at al-Qādisiyyah (636) and Nahāvand (642, remembered as the “Victory of Victories”) broke organized Sasanian resistance, though the last Sasanian king, Yazdegerd III, continued fleeing eastward until his death near Merv in 651.