Colton Smith (born March 5, 2003) is an American professional tennis player. He has a career-high ATP singles ranking of world No. 133, achieved on 25 August 2025.
Smith played college tennis at University of Arizona.
Smith reached his first Challenger final at the Sioux Falls Challenger losing to Borna Gojo in the final.
Smith won his maiden Challenger singles title at the 2025 Cleveland Open.
Smith qualified at the 2025 Indian Wells Open making his ATP Tour and also Masters 1000 main draw debut and defeated Flavio Cobolli to record his first tour-level win.
At the 2025 U.S. Men's Clay Court Championships, Smith qualified and reached the quarterfinals for the first time in an ATP Tour event, first defeating James Duckworth in straight sets, and then defeating 2023 NCAA champion Ethan Quinn also in straight sets before losing to top seed Tommy Paul in the quarterfinal.
In July, Smith played his second Masters 1000, qualifying for the main draw at the National Bank Open in Toronto but lost to Learner Tien in the first round.
Current through the 2025 Cincinnati Open.