1921 is a year.
1921 may also refer to:
- "1921" (song), a song by The Who on their 1969 album Tommy
- 1921 (1988 film), an Indian Malayalam-language historical film
- 1921 (2018 film), an Indian Hindi-language horror film, third part of the 1920 film series
- 1921 (2021 film), a Chinese film
- 1921: Puzha Muthal Puzha Vare, a 2022 Indian Malayalam-language historical drama film