Stefan Dostanic (Serbo-Croatian: Dostanić; born November 4, 2001) is an American tennis player. He has a career-high ATP singles ranking of world No. 389, achieved on 25 August 2025.

He is from Irvine, California. He attended college at University of Southern California before transferring to Wake Forest University. In 2025, he was part of the team to win the 2025 NCAA Team Championship.

Dostanic made his qualifying Masters 1000 debut after he earned a wildcard for the 2024 Indian Wells, having qualified in 2023 through the USTA SoCal Pro Series. He lost to Sumit Nagal in the first round.

Dostanic received a wildcard for the main draw of the 2025 US Open, after winning the American collegiate wildcard tournament over Michael Zheng, for his Grand Slam main draw debut.

He was awarded a wildcard into the main draw of the 2025 Winston-Salem Open and recorded his first ATP win over Aleksandar Vukic.