Crotalaria aegyptiaca is known to occur throughout the majority of north-east UAE, including at Jebel Hafeet (Stuart and Stuart 1998). It appears to prefer lower elevations (Feulner 2011). Globally, this species ranges from Egypt to India and northern Somalia (Board of Trustees, RBG Kew 2019).

Within the UAE, it has been recorded from Dibba in the northeast of the country (Jongbloed et al. 2003) and from the Ru'us al-Jibal, between 200 and 1,300 m altitude (Feulner 2011). It is described as being widespread within the Hajar Mountains (Feulner 2011). Globally, the native range of this species spans from northern Africa to the Arabian Peninsula, central Asia and India and on to south-east European Russia (Board of Trustees, RBG Kew 2019).

Within the UAE, it has been recorded from Umm al Quwain and Hatta in the north of the country (Jongbloed et al. 2003). It has also been reported from a single locality in the Ru'us al-Jibal (Feulner 2011). The native range of this species spans from Libya to Pakistan (Board of Trustees, RBG Kew 2019).

Within the UAE, it has been recently reported from Jebel Hafeet (Sakkir and Brown 2014). It is also widespread within coastal areas and within the inland sandy desert (Jongbloed et al. 2003, MEW 2010). The native range of this species spans across the Sahara to Pakistan (Board of Trustees, RBG Kew 2019).

Within the UAE, it is known to occur in the Ru'us al-Jibal and the southern Hajar Mountains (Jongbloed et al. 2003, Feulner 2011). Globally, the native range of this species spans from northern and northeast tropical Africa, through to the Arabian Peninsula and on to Pakistan (Board of Trustees, RBG Kew 2019).

In the UAE, this species is widespread throughout the northern Emirates (Jongbloed et al. 2003). It has also been recorded within the Ru'us al-Jibal, up to altitudes of 1000 m (Feulner 2011). Globally, this native range of this species spans across both the tropical and the subtropical Old World (Board of Trustees, RBG Kew 2019).

This species is widespread in the eastern part of the country (Jongbloed et al. 2003, Feulner 2011). The native range is from Uganda to Egypt, through Sinai to the Arabian Peninsula (Board of Trustees, RBG Kew 2019).

The species has a restricted distribution, recorded from the northern Hajar Mountains and the Ru'us al Jibal, from 400 m to at least 1,200 m (Jongbloed et al. 2003, Feulner 2011). The EOO is less than 700 km². The native range of the species is southern and central Europe, the eastern Mediterranean and the Arabian Peninsula, to Iran; introduced to large parts of eastern North America and northern Europe (Board of Trustees, RBG Kew 2019).

Originally thought to occur in just scattered locations (Jongbloed et al. 2003), this species is now thought to be more widespread (MEW 2010). Western (1991) recorded the species from Sir Bani Yas Island in plantations, although the origin there requires confirmation. The species occurs in Wadi Wurayah National Park (WWNP), where it is common in peri-anthropic waste ground (Feulner 2016). In the southern Hajar Mountains in the UAE, the species occurs along the ridge tops in the 'Olive Highlands' (Feulner 2014). Sharjah Seedbank & Herbarium hold specimens from inland localities (including in Sharjah, R'as al-Khaimah and in Sharjah Emirate on the east coast at Kalba. The species is considered native to North America, Africa and the Arabian Peninsula (Board of Trustees, RBG Kew 2019). The native status of the species in the Americas has been controversial, but molecular research suggests that it is native there (Martín-Bravo et al. 2007).

Within the UAE, this species is widespread in the Hajar Mountains and the Ru'us al-Jibal (Jongbloed et al. 2003), including Wadi Helo (El-Keblawy et al. 2016). The species also occurs on Jebel Hafeet (Stuart and Stuart 1998, Fawzi and Ksiksi 2012) and on the lower slopes of ravines in the 'Olive Highlands' (Feulner 2014). The global range of this species is from north-east Africa (Egypt to north-east tropical Africa), the eastern Mediterranean, Jordan to the Arabian Peninsula (Board of Trustees, RBG Kew 2019).