Olle Wallin (born 22 October 2001) is a Swedish tennis player. Wallin has a career high ATP singles ranking of No. 384 achieved on 16 March 2026 and a career high ATP doubles ranking of No. 853 achieved on 30 March 2026.
Wallin made his ATP main draw debut after receiving a wildcard for the doubles main draw of the 2025 Swedish Open. He also reached the final round of the singles qualifying, losing to Filip Misolic.
Wallin played college tennis at Charlotte before transferring to Texas Tech.