
Ashura, also known as Yawm Ashura is the tenth day of Muharram, the first month in the Islamic calendar. For Sunni Muslims, Ashura marks the day that Moses and the Israelites were saved from Pharaoh by God creating a path in the Sea. For Shia Muslims, it marks the day that Husayn ibn Ali, the grandson of the Islamic prophet Muhammad, was martyred in the Battle of Karbala. Ashura is a major holy day and occasion for pilgrimage in Shia Islam, as well as a recommended but non-obligatory day of fasting in Sunni Islam.

This article contains the list of casualties of Husayn ibn Ali's companions in the Battle of Karbala. The battle took place on Muharram 10, in the year 61 AH of the Islamic calendar in Karbala, situated in present-day Iraq.

Al-Abbas ibn Ali ibn Abi Talib, also known as Abu al-Fadhl and Qamar Bani Hashim, was a son of Ali and Fatima bint Hizam, commonly known as Umm al-Banin.

Abdullah ibn Ali ibn Abi Talib is one of Ali's sons who was killed in Karbala, and is considered among the martyrs of the Battle of Karbala. Abdullah is also among the four sons of Umm al-Banin the daughter of Hazam.

Abdullah ibn Hasan was the son of Hasan ibn Ali. He went to Karbala with his uncle (Hussain), and finally was killed at the battle of Karbala.He was a great warrior and killed many enemies in the battle of karbala. Also, his name has been mentioned in Ziyarat Nahiya Muqaddasa.

Ali al-Akbar ibn Al-Husayn, commonly known as simply Ali al-Akbar, was the son of Al-Husayn ibn Ali, the third Shia Imam, and Umm Layla. He was killed at the age of 18 on the day of Ashura, in the Battle of Karbala’. According to Jean Calmard writing in Iranica, ‘Ali al-Akbar's reputation as a valiant warrior of the Household of Muhammad might have preceded that of Al-‘Abbas ibn ‘Ali.

Abdullah Ali al-Asghar ibn Al-Husayn, or simply Ali Asghar, was the youngest child of Al-Husayn and Rubab bint Imra’ al-Qays. He was martyred during the Battle of Karbala, and is commemorated in shia as the "personified quintessence of the innocent victim."

Beshr ibn Hasan was a great-grandson of Muhammad. He was the son of second Shia Imam Hasan ibn Ali. He is considered to be one of the martyrs of the Battle of Karbala, although no record describes the circumstances surrounding his death by enemy forces.

Habīb ibn Madhāhir al-Asadi was of the Banu Asad clan, and one of the companions of Ali, Hasan ibn Ali and Husayn ibn Ali. He was one of the people of Kufa who sent letters to Husayn ibn Ali and invited him to Kufa. Though, when he realized that people of Kufa have broken their allegiance to Husayn, he left Kufa, joined Husayn, and was martyred at the age of 75 while fighting in Husayn's army, in Karbala.

Al-Hurr ibn Yazid bin Najiyah Al-Tamimi Al-Yarbuʿi Ar-Riyahi was the general of the Ummayad army dispatched from Kufa, Iraq to intercept al-Husayn ibn Ali ibn Abu Talib. The newly appointed governor of Kufa, Ubayd Allah ibn Ziyad, issued the command to guard all entrances and exits to Kufa in order to intercept al-Husayn(a.s)for an oath of allegiance to Yazid ibn Mu'awiya ibn Abu Sufyan of the Ummayad dynasty. Al-Hurr ibn Yazid al-Tamimi al-Yarbu'i wasal-Husayn(a.s) long with his 1,000 soldiers to sanction al-Husayn(a.s) and his followers and bring themal-Husayn(a.s) Initially responsible for holding al-Husayn and his followers captive, al-Hurr died fighting on al-Husayn's(a.s) behalf after decisions fueled by corrupt intentions surfaced from Ubayd Allah ibn Ziyad. Al-Hurr's short but provocative mark on history spans less than one week's time, but is embedded with complex details and fatal turns of events that led to the martyrdom of al-Husayn(a.s)during the Battle of Karbala.

Husayn ibn Ali ibn Abi Talib was a grandson of the Islamic prophet Muhammad and a son of Ali ibn Abi Talib and Muhammad's daughter Fatimah. He is an important figure in Islam as he was a member of the Household of Muhammad and the People of the Cloak, as well as the third Shia Imam.

Ja'far ibn Ali ibn Abu Talib was a son of Ali and Umm ul-Banin. He was named by Ali after the latter's brother, Ja'far ibn Abi Talib. The younger Jafar was one of the companions of Husayn in the Battle of Karbala, where he was martyred on Ashura alongside his brothers Abbas, Abdullah and Uthman.

Qasim ibn al-Hasan, supported his uncle Husayn Ibn Ali in fighting off the Umayyad forces during the Battle of Karbala where he was killed in his teens.