Alyaksey (; also spelled Aliaksiej) is a Belarusian masculine given name. It is a derivative of Alexey. Notable individuals with the name include:
Aleksey Baga (born 1981), Belarusian football coach and player Alyaksey Belavusaw (born 1976), Belarusian footballer Alyaksey Dvaretski (born 1977), Belarusian football coach and player Aleksey Gavrilovich (born 1990), Belarusian footballer Alyaksey Ivanow (born 1997), Belarusian football coach Alyaksey Kazlow (born 1989), Belarusian footballer Alyaksey Khaletski (born 1984), Belarusian football coach and player Alyaksey Krawchanka (born 1985), Belarusian football coach and player Aleksei Kulbakov (born 1979), Belarusian football referee Aleksey Legchilin (born 1992), Belarusian footballer Alyaksey Martynets (born 1985), Belarusian footballer Alyaksey Merkulaw (born 1972), Belarusian football player and coach Alyaksey Pankavets (born 1981), Belarusian footballer Alyaksey Paznyak (born 1981), Belarusian footballer Alyaksey Plyasunow (born 1991), Belarusian footballer Alyaksey Pohe (born 1977), Belarusian footballer Alyaksey Pyatrow (born 1991), Belarusian footballer Aleksey Rios (born 1987), Belarusian footballer Aliaksiej Skoblia (1990–2022), Belarusian soldier who died fighting for Ukraine in the 2022 Russian invasion of Ukraine Aliaksiej Sokal (born 1973), Belarusian communist politician Alyaksey Suchkow (born 1981), Football player Alyaksey Tarabanaw (born 1984), Belarusian footballer Aliaksei Tsapik (born 1988), Belarusian track and field athlete Alyaksey Tsimashenka (born 1986), Belarusian footballer Alyaksey Vasilewski (born 1993), Belarusian footballer Alyaksey Yanushkevich (born 1986), Belarusian footballer