Aleh is a transliteration from Belarusian Алег of the Eastern Slavic name Oleg. It is sometimes spelled as "Aleg". Notable people with the name include:
Surname Jo Aleh (born 1986), New Zealand sailor, national champion, world champion, Olympic champion
Given name Aleh Ahiyevich (born 1993), Belarusian racing cyclist Aleh Akhrem (born 1983), Belarusian volleyball coach and player Aleh Byabenin (c. 1974–2010), Belarusian journalist Aleh Chakunkov, Belarusian diplomat Aleh Charnyawski (born 1970), Belarusian footballer Aleh Hulak (1967–2022), Belarusian human rights activist Aleh Kavalyow (born 1987), Belarusian footballer Aleh Loban (born 1985), Belarusian weightlifter Aleh Lukashevich (born 1972), Belarusian journalist, television presenter, director and photographer Aleh Mikhalovich (born 1979), Belarusian Greco-Roman wrestler Aleh Patotski (born 1991), Belarusian football player Aleh Popel (born 1983), Belarusian footballer Aleh Shkabara (born 1983), Belarusian footballer Aleh Slautin (born 1986), Ukrainian-Belarusian football player Aleh Trusaŭ, Belarusian academic and politician Aleh Tsyvinski (born 1977), Belarusian-American economist Aleh Veratsila (born 1988), Belarusian footballer Aleh Yurenia (born 1990), Belarusian sprint canoeist
See also Pareh Aleh, a village in Iran