Durant is very close with his mother, Wanda, a relationship that was detailed in the Lifetime movie The Real MVP: The Wanda Pratt Story. During his time with the Thunder, Durant described himself as a "high school kid" who enjoys playing video games in his spare time. A Christian, Durant has religious tattoos on his stomach, wrist, and back. He owns several properties in the Oklahoma City area and listed his primary residence, located in the affluent Club Villa neighborhood, for sale for $1.95 million in 2013. That same year, he opened a restaurant, KD's Southern Cuisine, in the Bricktown neighborhood and briefly became engaged to Monica Wright, a WNBA player. In 2016, he was a credentialed photographer for The Players' Tribune at Super Bowl 50.
Durant was formerly represented by agents Aaron Goodwin and Rob Pelinka. He left Pelinka in 2013 and signed with the Roc Nation group, headed by Jay-Z. Durant has endorsement deals with Nike, Sprint, Gatorade, Panini, General Electric, and 2K Sports. In 2012, he tried his hand at acting, appearing in the children's film Thunderstruck. In 2013, he earned $35 million, making him the fourth-highest-earning basketball player that year. In an interview with Sports Illustrated, Durant claimed that, despite his high earnings potential, "global marketing and all that stuff" does not interest him.
One of the most popular players in the league, Durant's jersey regularly ranks as one of the NBA's best-selling and he is consistently one of the top All-Star vote-getters. Early in his career, he developed a reputation for his kind demeanor; in 2013, Foot Locker released a series of commercials calling him the "nicest guy in the NBA", and become a beloved figure in Oklahoma City, known for his "nice escapades" toward the Thunder's staff. In 2014, he partnered with KIND snacks and launched StrongAndKind.com to show "being kind is not a sign of weakness." Since joining the Warriors, he has become more outspoken and controversial; for example, he was involved in a Twitter back-and-forth with C.J. McCollum in July 2018. Durant has admitted to feeling more genuine in Golden State as opposed to Oklahoma City, where he was "just trying to please everybody".
Throughout his career, Durant has participated in philanthropic causes. In 2013, he pledged $1 million to the American Red Cross for the victims of the 2013 Moore tornado. His generosity inspired the Thunder and Nike to match his donation. He is also a spokesperson for the Washington, D. C. branch of P'Tones Records, a nationwide non-profit after-school music program.