NCT 2020 Resonance is the second studio album by South Korean boy band NCT, an unlimited group project under the management of SM Entertainment. Similar to their previous release NCT 2018 Empathy, NCT 2020 Resonance is part of the "NCT 2020" project; which saw all current NCT members from several units collaborating on a full-length release. This time, the album features all 23 members from three current units of NCT; NCT 127, NCT Dream, and WayV, while introducing two new NCT members, namely Shotaro and Sungchan. It would also be the final NCT album to feature Lucas due to his hiatus and eventual departure in 2023. The first part was released on October 12, 2020, and the second part was then released on November 23, 2020.

NCT is a South Korean boy band formed and managed by SM Entertainment. Introduced in January 2016, the group currently consists of 26 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 May 2023, NCT has recorded more than 32 million album sales 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.