"When We Were Young" is a song by British singer Adele. It was released on 22 January 2016 by XL Recordings as the second single from her third studio album, 25 (2015). Adele co-wrote the song with Tobias Jesso Jr., while production of the track was provided by Ariel Rechtshaid. "When We Were Young" is a soul ballad, with lyrics that talk about reminiscing past memories with a loved one. Upon release, the song received critical acclaim from music critics, who praised the song's lyrics and Adele's vocals.

Following the release of 25, "When We Were Young" had already sold 150,000 digital copies in the United States as an album track. It has reached the top 10 in Belgium, Canada, Czech Republic, Finland, Portugal, Scotland, Slovakia, South Africa, Switzerland and the United Kingdom. The song never received an official music video, although a version of the song filmed at The Church Studios was released via Vevo. Adele promoted the song with live performances on the BBC one-hour special Adele at the BBC, Saturday Night Live and Adele Live in New York City.