Adam Heinonen (born 22 August 2002) is a Swedish tennis player. Heinonen has a career high ATP singles ranking of No. 735 achieved on 17 February 2025 and a career high ATP doubles ranking of No. 162 achieved on 30 March 2026.
Heinonen made his ATP main draw debut at the 2024 Stockholm Open after receiving a wildcard into the doubles main draw with Leo Borg.
Heinonen represents Sweden at the Davis Cup, though he has not yet appeared in a match.