NBA 2K18 is a basketball simulation video game developed by Visual Concepts and published by 2K Sports. It is the 19th installment in the NBA 2K franchise and the successor to NBA 2K17. It was released in September 2017 for Microsoft Windows, Nintendo Switch, PlayStation 4, PlayStation 3, Xbox One, and Xbox 360.

NBA 2K18 is a basketball simulation game which, like the previous games in the series, strives to realistically depict the National Basketball Association (NBA), as well as present improvements over the previous installments. The player mainly plays NBA games with real-life or customized players and teams; games follow the rules and objectives of NBA games. Several game modes are present and many settings can be customized. In terms of commentary, Kobe Bryant and Kevin Garnett appear as guest commentators.

NBA 2K18 adds seventeen more such teams, including the 2007–08 Denver Nuggets and the 1998–99 New York Knicks, as well as 'All-Time Teams', teams for each franchise consisting of the greatest players in the respective franchise's history.

NBA 2K18, like the previous games in the series, is based on the sport of basketball; more specifically, it simulates the experience of the National Basketball Association (NBA). Several game modes are present, including the team-managing MyGM and MyLeague modes, which were a considerable emphasis during development, and MyCareer, in which the player creates and plays through the career of their own player.