The Huwaytat (Arabic: الحويطات al-Ḥuwayṭāt, Northwest Arabian dialect: ál-Ḥwēṭāt) are a large Hashemite Ashraf tribe descending from Husayn ibn Ali that inhabits areas of present-day southern Jordan, the Sinai Peninsula and Sharqia governate in Egypt, the Negev in Israel, and northwestern Saudi Arabia. The Huwaytat have several branches, notably the Ibn Jazi, the Abu Tayi, the Anjaddat, and the Sulaymanniyin, in addition to a number of associated tribes.

The ancestor of the Huwaytat, Alayan al-Jammazi al-Husayni al-Hashimi, had arrived in the Syrian desert from Medina accompanied with other members of the ashraf social class in the city. He had fallen sick while upon this journey and had to stop travelling, he was taken in by the chief of the Ma'azah tribe in al-Aqaba, Atiyyah. Here Alayan had become settled, him being the only learned and literate person in the vicinity of the tribe meant that he would be able to unfold fraudulent activities and deceit done by the people of the area, thus they called him al-Huwayt, literally meaning the little wall as he kept unravelling their schemes. This name would be then taken up by his descendants.

Alayan al-Jammazi was a descendant of Ali al-Sajjad, son of Husayn ibn Ali, son of Ali and Fatima. His lineage is as follows; Alayan al-Huwayt ibn Jamaaz ibn Hashim ibn Salim ibn Mahna ibn Dawood ibn Mahna ibn Jamaaz ibn al-Qasim ibn Mahna al-Araj ibn Husayn ibn Mahna ibn Dawood ibn Ahmad al-Qasim ibn Ubaydullah al-Amir ibn Tahir Sheikh al-Hijaz ibn Yahya al-Nesabah ibn al-Husayn ibn Abu Muhammad Ja’far al-Hujjah ibn Ubaidullah al-A’raj ibn al-Husayn al-Asghar ibn Imam Ali Zain al-Abidin ibn Imam Al-Hussein ibn Imam Ali ibn Abi Talib.

Huwaytat nomads were recorded as the only tribesmen living in the southern, inland area of the Karak Sanjak of the Ottoman Empire in the 16th century.

They developed into a partly settled tribe, combining farming in the fertile areas of al-Sharat with pastoralism, but early in the 20th century were rendered more or less nomadic by the activities of two rival sheikhs, Abtan ibn Jazi and Auda Abu Tayi, who concentrated on raiding, collection of tribute and camel-herding.

The Abu-Tayi subclan of the tribe were supporters of the Hashemite cause during the Arab Revolt, in which they formed an important part of Faisal's forces; Auda Abu Tayi was able to muster a force of Bedouin tribesmen willing to march on Aqaba under the banner of Prince Feisal bin Hussein. The ibn-Jazi subclan of the tribe remained loyal to the Ottoman Empire: their leader Hamad ibn Jazi was decorated by the empire in early 1917. In later years, the Howeitat returned to farming; they were also prominent in the Arab Legion, the Ibn Jazi section becoming the most powerful component in the federation. The Huwaytat still have possession of large areas of land around Wadi Rum and stretching into Saudi Arabia; they have historically been a significant source of manpower for the Saudi Arabian National Guard and the Royal Jordanian Land Force.

In 1938, the Huwaytat tribe in Transjordan was estimated to be around 1,000 tents. They resided in the Ma'an and 'Aqaba region, around Tafilah, and in the plan of ash-Sher'ah in Edom.

Nowadays, the Huwaytat tribe has largely given up its nomadic lifestyle, and settled into villages. On 13 April 2020 a Howeitat man named Abdul Rahim al-Huwaiti posted videos online announcing that Saudi security forces were trying to evict him and other members of the tribe from their historic homeland to make way for the development of Neom. Alya Abutayah Alhwaiti, a Saudi human rights activist also of the Howeitat tribe, circulated the videos. In the videos Abdul Rahim al-Huwaiti said he would defy the eviction orders though he expected Saudi authorities would plant weapons in his house to incriminate him.