Durant was born on September 29, 1988, in Washington, D.C., to Wanda (née Durant) and Wayne Pratt. When Durant was an infant, his father deserted the family; Wanda and Wayne eventually divorced, and Durant’s grandmother Barbara Davis helped raise him. By age 13, his father reentered his life and traveled the country with him to basketball tournaments. Durant has a sister, Brianna, and two brothers, Tony and Rayvonne.

Durant was selected as the second overall pick in the 2007 NBA draft by the Seattle SuperSonics. In his first regular season game, the 19-year-old Durant registered 18 points, five rebounds and three steals against the Denver Nuggets. On November 16, he made the first game-winning shot of his career in a game against the Atlanta Hawks. At the conclusion of the season, he was named the NBA Rookie of the Year following averages of 20.3 points, 4.4 rebounds and 2.4 assists per game. He joined Carmelo Anthony and LeBron James as the only teenagers in league history to average at least 20 points per game over an entire season.

In February 2007, Durant received an invitation to the United States national team training camp. Despite a strong performance, he was cut from the team when its roster was trimmed to its twelve-player limit. Coach Mike Krzyzewski cited the experience of the remaining players as the deciding factor in making the cut. Durant was finally selected to the national team at the 2010 FIBA World Championship and became their leader as other All-Stars were unavailable, a role he downplayed. At the tournament, he led Team USA to its first FIBA World Championship since 1994, earning tournament MVP honors in the process. His final averages for the competition were 22.8 points, 6.1 rebounds, 3.1 assists, and 1.4 steals per game in nine games.

At the 2012 Olympics, Durant set the record for total points scored in an Olympic basketball tournament. With averages of 19.5 points, 5.8 rebounds, 2.6 assists, and 1.6 steals per game, he helped the national team go undefeated en route to a gold medal. In the tournament’s final game, he led all scorers with 30 points.

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.

Early in Durant’s career, he was criticized for his slim build, defense, and passing. Over time, he grew as a playmaker, increasing his assist numbers every year from 2010 to 2014, though his overall vision still lagged behind the league’s best passers’. He also showed defensive improvement, with opponents averaging just .62 points per isolation play against him in 2014, the best success rate for defensive players who faced at least 100 isolations that season. Upon going to Golden State, he developed into a more reliable off-ball defender and rim protector, and in 2018 was considered for the NBA Defensive Player of the Year Award.

Less than a month before the start of the 2014 FIBA Basketball World Cup, Durant announced that he would be dropping out of the competition, citing mental and physical exhaustion as reasons for his departure. He rejoined Team USA in 2016 for the Olympics, where he led them to a gold medal. In recognition of his performances, Durant was named the 2016 co-USA Basketball Male Athlete of the Year, along with Carmelo Anthony, for the second time in his career.

Durant is best known for his prodigious scoring ability. From 2010 to 2014, he won four scoring titles, becoming one of only two players to win four scoring titles in a five-year span. Early in his career, his playing style was isolation-driven, but he quickly developed into an excellent off-ball player who was capable of scoring from the outside as well. By 2013, he was shooting at a historically-great clip, which helped him become one of only seven members of the 50–40–90 club. This ability to impact the offense in a variety of ways helped Durant remain effective and improve an already elite offense upon joining the Warriors in 2016. Throughout his career, his height and 7 ft 4 in (2.24 m) wingspan have created matchup problems for defenses as he is able to get off a clean shot regardless of the situation. Upon beating his man or gaining momentum, he also becomes a strong finisher at the rim; for example, he converted 72.2% of shots in the paint in 2012.

In 2017, Durant became involved with YouTube. In February, he visited YouTube’s headquarters for a speaking engagement. On April 7, 2017, he created a YouTube account and soon began to upload live stream vlogs onto it. In his first vlog, he detailed, “I’m so excited because I got off social media. I got off the Instagram, Twitter, all that stuff, just to distance myself a bit. But somebody talked me into getting on the YouTube.” As of June 2020, Durant’s YouTube channel has received over 790,000 subscribers and 38 million video views. On February 13, 2018, Deadline reported that Durant, in partnership with producer Brian Grazer’s Imagine Television, will create a basketball-themed scripted drama for Apple.

On July 7, 2018, Durant re-signed with the Warriors, on a reported two-year, $61.5 million contract, which included a player option for the second year. During an overtime loss to the Clippers on November 12, 2018, Green cursed out Durant over his upcoming free agency status after the season, and he was suspended for the much-publicized blowup. On November 29, Durant scored a season-high 51 points in a 131–128 overtime loss to the Toronto Raptors, thus scoring 40 or more in his third straight game. With Curry and Green sidelined for most of November, the Warriors finished the month with a 15–8 record and five straight road losses, after starting the season at 10–1. In Game 5 of the first round of the playoffs, he scored a playoff career-high 45 points in a 129–121 loss to the Los Angeles Clippers. In Game 6, he set a new playoff career high with 50 points in a 129–110 win to close out the series. During Game 5 of the Western Conference semifinals against the Houston Rockets, Durant suffered a right calf strain, subsequently missing Game 6, in which the Warriors won the series, as well as the entire Western Conference Finals against the Portland Trail Blazers, which the Warriors won in a four-game sweep. After missing nine games with the strained right calf, Durant returned to action in Game 5 of the 2019 finals against Toronto, and scored 11 points in the first quarter. However, he was lost for the game two minutes into the second quarter when he tried to drive by former teammate Serge Ibaka and suffered an Achilles tendon injury, falling and grabbing his lower right calf. He limped off the court and was helped to the locker room. The Warriors won the game to cut the Raptors’ series lead to 3–2. The Warriors went on to lose the NBA Finals in Game 6, ending their quest for a three-peat.

On June 30, Durant announced that he planned to sign with the Brooklyn Nets after the July moratorium ended on July 6. On July 1, Golden State CEO Joe Lacob announced that Durant’s No. 35 will no longer be issued by the Warriors. Durant signed with Brooklyn on July 7, 2019, in a sign-and-trade deal.

On March 17, 2020, Durant and three other Nets players tested positive for COVID-19. On April 1, 2020 it was announced that Durant was cleared and had recovered.

In 2020, Durant’s company Thirty Five Ventures produced Basketball County, a documentary about youth basketball in Durant’s home county of Prince George’s County, Maryland. Durant served as an executive producer and appeared in interviews.

On June 15, 2020, Durant became a minority owner of MLS side Philadelphia Union, acquiring a 5% stake with the possibility to add another 5% in the near future.