Alaina Denise Coates (born April 7, 1995) is an American professional basketball player who is a free agent.

After receiving offers from Tennessee, and Georgia, she eventually chose South Carolina to play for her hometown team.

In her senior season, Coates injured her ankle, which caused her to miss South Carolina's SEC Tourney & National Championship run.

[3] She made her career debut on May 19, 2018, in the Sky's season opener against the Indiana Fever, she scored 5 points in 12 minutes of play in an 82–64 victory.

[4] On July 3, 2018, Coates scored in double digits for the first time with 10 points in 16 minutes of play during a 108–85 loss to the Dallas Wings.

Coates signed with the Washington Mystics on June 29, 2020, and made her debut for the team on the opening day of the season.

[14] Coates played for Nesibe Aydın GSK of the Turkish Women's Basketball Super League (TKBL) in the 2021–2022 season.

Her uncle, Ben Coates, is retired from the NFL and was a member of the Baltimore Ravens first Super Bowl.