NCT (Korean: 엔시티; RR: Ensiti; an acronym for Neo Culture Technology) is a South Korean boy band formed and managed by SM Entertainment. Introduced in January 2016, the group currently consists of 25 members divided into six different sub-units: NCT U, NCT 127, NCT Dream, WayV, NCT DoJaeJung, and NCT Wish. They are known for their versatility in music, vocal and rap abilities, and powerful performances, and have been cited as K-pop's "most experimental boy band" due to their concept of having limitless members. As of June 2024, NCT has recorded more than 40 million album sales only in Korea across all sub-units, making them the best-selling act under SM Entertainment and one of the best-selling K-pop artists of all time.

The group debuted their first sub-unit, the rotational NCT U, on April 9, 2016, with the double digital single "The 7th Sense" and "Without You". It was followed by the Seoul-based sub-unit NCT 127 on July 7, 2016, with their eponymous extended play and the then-teenaged sub-unit NCT Dream on August 24, 2016, with the digital single "Chewing Gum". WayV, a seven-member sub-unit based in China and NCT's first overseas sub-unit, debuted on January 17, 2019, with the single album The Vision. On April 17, 2023, a new fixed sub-unit featuring members Doyoung, Jaehyun, and Jungwoo debuted as NCT DoJaeJung with the extended play (EP) Perfume. NCT's next overseas unit, NCT Wish, debuted in 2024 as their final overseas subunit.

Although each sub-unit promotes separately, NCT has united four times as a group to record four full-length albums: Empathy (2018), Resonance (2020), Universe (2021), and Golden Age (2023). Within two months of release, Resonance sold over 2.6 million copies across its two parts, becoming the highest-selling physical album released by an act from SM Entertainment at the time and earning the group their first Daesang (Grand Prize) Award at the 2020 Asia Artist Awards. Universe, which was released in December 2021, became their most pre-ordered album at 1.7 million copies, and later surpassed 1.8 million sales after its release.