Mikalai is a masculine Belarusian given name. Notable people with the name include:
Mikalai Barkouski, Belarusian judoka Mikalai Kamianchuk (born 1987), Belarusian pair skater Mikalai Novikau (born 1986), Belarusian weightlifter Mikalai Sharlap (born 1994), Belarusian rower Mikalai Shubianok (born 1985), Belarusian decathlete Mikalai Zhukavets (born 1986), Belarusian windsurfer