Inducted into the Florida State Athletics Hall of Fame in 2022. Other men's golf inductees include 12-time PGA TOUR winner Paul Azinger, 19-time PGA TOUR winner Hubert Green, and six-time PGA TOUR winner Jeff Sluman.

Featured in ESPN the Magazine's "Body Issue" in 2019.

In 2019, established the Brooks Koepka Foundation Fund at the Community Foundation for Palm Beach and Martin Counties. Notably raised $450,000 for the Hurricane Dorian relief efforts in The Bahamas, and granted over $200,000 to the COVID-19 response relief in South Florida. Through his "12 Days of Brooksmas", Koepka raised awareness and provided funds to 12 different organizations and non-profits.

Enjoys being on the water, jet skiing, fishing, paddle boarding during his off weeks.

Favorite sports teams are Manchester United Football Club (soccer), Los Angeles Lakers (NBA basketball), Green Bay Packers (NFL football), and Florida Panthers (NHL hockey). Loved Brett Favre growing up and says that is why he is a Packers fan.

Father, Bob, played college baseball; he was a pitcher at West Virginia Wesleyan College, an NAIA program which later became an NCAA Division II program in Buckhannon, West Virginia.

Younger brother, Chase, played four seasons at University of South Florida (2012-16) and played professionally on the DP World Tour (2018 season) and PGA TOUR Canada (2021). Chase was inducted into the USF Athletic Hall of Fame in 2024.

Great uncle is Dick Groat, a two-time World Series-winning shortstop for the Pittsburgh Pirates and the 1960 National League Most Valuable Player. Father Bob Koepka's mother, Mary Margaret, is Groat's older sister. A multi-sport athlete at Duke University, Groat was the third overall pick in the 1952 NBA Draft (chosen by the Fort Wayne Pistons). In 2019, Grout retired after 40 seasons as a radio analyst for the University of Pittsburgh men's basketball team. Groat passed away in April 2023 at 92 years of age.

Played four seasons at Florida State University (2008-12), where he earned three individual victories, broke the school record for career scoring average (71.84) previously established by 19-time PGA TOUR winner Hubert Green (72.16 from 1965-68), and was a two-time Atlantic Coast Conference Player of the Year (2010, 2012). Also earned a 2010 All-America Third Team honor and 2012 All-America Second Team laurel, in addition to being named the 2009 ACC Freshman of the Year.