The species generally seems to be found within the northeast of the UAE and has been described as widespread within the Hajar Mountains (Chamberlain 1996). It is known to occur in the Ru'us al-Jibal within the UAE, where it is found up to 900 m in altitude (Feulner 2011). Globally, the native range of this species encompasses Macaronesia, northern Africa, northeast tropical Africa and the Arabian Peninsula (Board of Trustees, RBG Kew 2019).

Within the UAE, this species has only been recorded from Wadi Bih (Böer and Chaudhary 1999, cited in Feulner 2011). Globally, the native range of this species extends from the Mediterranean and northern Africa to Pakistan (Board of Trustees, RBG Kew 2019).

Within the UAE, this species is reported as widespread within the Hajar Mountains and in the southern Ru'us al-Jibal (Jongbloed et al. 2003). It has been reported from altitudes up to c. 1,200 m in the Ru'us al-Jibal (Feulner 2011). Globally, this species is native to Europe, northern and eastern Africa and the Arabian Peninsula (Board of Trustees, RBG Kew 2019).

In the UAE, Feulner (2011) reported the species from higher altitudes (1,500 m) in the Ru'us al-Jibal. The species appears to have a disjunct global range, with occurrences in Sinai, the Arabian Peninsula (Oman and saudi Arabia, UAE not listed), Turkey and Syria, and then Central Asia cited by Plants of the World Online (Board of Trustees, RBG Kew 2019), whilst Chamberlain (1996) restricted the species to south-west Asia (Oman and Saudi Arabia).

Within the UAE, it has been reported from R'as al-Khaimah, Fujairah, Masafi and the Ru'us al-Jibal (Jongbloed et al. 2003, Brown et al. 2007, Feulner 2011) and has been recently recorded from Jebel Hafeet (Sakkir and Brown 2014). In the Ru'us al-Jibal, this species is reported from 300-1,000 m altitude (G.R. Feulner, in lit, MEW 2010). Globally, the native range of this species spans across Africa, Europe and temperate Asia (Board of Trustees, RBG Kew 2019).

Within the UAE, this species is considered to be widespread and is found in Abu Dhabi, Al Ain and R'as al-Khaimah (Brown et al. 2007, Karim and Dakheel 2006). It generally occurs along the Arabian Gulf coast and in the Ru'us al-Jibal (Jongbloed et al. 2003). This plant has been recorded at altitudes up to 1,600 m in the Ru'us al-Jibal (Feulner 2011). Globally, the native range of this species spans from Africa to temperate Asia (Board of Trustees, RBG Kew 2019).

Amaranthus graecizans occurs in coastal areas, as well as Al Ain and offshore islands in the UAE (Jongbloed et al. 2003). MEW (2010) comment that the species is common in coastal areas and also found in moist disturbed areas, suggesting that the species may have been spread by humans within the UAE. It is known to occur within farms in the Liwa area, in addition to localities between Abu Dhabi and Al Ain. Globally, this species occurs in North and Central Africa, southern Europe and the Middle East, and has been widely introduced (Board of Trustees, RBG Kew 2018).

It is widespread within the UAE, occurring in Dubai, Masafi, Fujairah, Al Ain and at Jebel Hafeet (Stuart and Stuart 1998, El Alqamy 2004, Karim and Dakheel 2006). It has also been spread to Abu Dhabi Island. Globally, this species occurs from Africa to Myanmar (Board of Trustees, RBG Kew 2019).

This halophytic species is found in scattered locations throughout the UAE (Jongbloed et al. 2003). The origin of the species in the UAE requires confirmation; whilst GRIN (2019) considers it to be native to the UAE, others consider (Anum et al. 2018, Xu 2019) it to be native to Africa. The global distribution of this species is from Africa to Israel and the Arabian Peninsula, and from Pakistan to India (Board of Trustees, RBG Kew 2019). Globally, it is a widespread introduced ruderal invasive weed of crops and cultivated areas.

This plant species has been recorded from Ras al Khaimah and Arabian Gulf islands, including Das Island (Western 1994, Gillett 2002, Jongbloed et al. 2003, Sakkir et al. 2017). In 2007, one individual was found at Taweela (Brown et al. 2007), although this area has now been lost as a result of development. The species is also scattered across offshore islands, and is thought to be common on Zirku and Arzanah. Further, in 2005 and 2007, this species was reported as being locally common in Al Jazeera al-Hamra (Ra's al-Khaimah). Therefore, it is possible that this plant species is more widespread in disturbed areas along the coastline (Brown et al. 2007). The estimated EOO is around 21,009 km² and it is considered to occur in 5-10 threat-based locations. The AOO has not been calculated as few point data are available, but is estimated to be very much less than 2,000 km² and inferred to be undergoing a continuing decline as a result of development. The global distribution of this species includes Europe, Africa and Asia-Temperate (Board of Trustees, RBG Kew 2018).