Mark Merklein (born June 28, 1972) is a Bahamian former college and professional tennis player.

He grew up in Coral Springs, Florida, and attended St. Thomas Aquinas High School in nearby Fort Lauderdale.

As a Gator, he won the NCAA national championship doubles title with partner David Blair in 1993.

The following year, Merklein won the NCAA national championship singles title in 1994 in dominating fashion, losing only one set.

Merklein was a four-time All-American, a three-time All-SEC selection, and the SEC Player of the Year in 1994.