Bob Alan Estes (born February 2, 1966) is an American professional golfer.

Estes was born in Graham, Texas and raised in Abilene, Texas. He first played golf at age 4 and decided to become a professional golfer at age 12. Estes attended the University of Texas from 1984 to 1988 and was a member of the golf team. He won the 1988 Haskins Award for most outstanding collegiate golfer in the nation.

Estes had four PGA Tour victories between 1994 and 2002, and he has been in the top 20 of the Official World Golf Ranking. He is particularly well known for his excellent short game. Estes follows a strict physical conditioning routine that includes weightlifting, agility exercises, diet and short-distance wind sprints. In addition, he has experimented with the 10-finger grip, which is rare in the modern game of golf.

In 2011, Estes was recovering from a wrist injury, but still managed to make 12 starts on the PGA Tour. Of the five cuts he made, one was a near-win at the Greenbrier Classic, where he lost in a playoff. Estes is 0-4 in PGA Tour playoffs. He still managed to finish 135th on the Tour's money list, but regained his Tour card through Q School and satisfied a medical extension.

After making the FedEx Cup in 2012, Estes only made two starts in 2013, missing the cut in Las Vegas and finishing T10 at Mayakoba. He is playing the 2014-15 season on a medical extension due to a shoulder injury.