Justin Boulais (born October 20, 2001) is an American-born Canadian tennis player. Boulais has a career high ATP singles ranking of No. 458 achieved on 30 March 2026 and a career high ATP doubles ranking of No. 306 achieved on 30 March 2026.
Boulais has won 1 ATP Challenger doubles title at the 2023 Calgary National Bank Challenger with Juan Carlos Aguilar.
Boulais plays college tennis at Ohio State.