Editing 1921 in music (section)

==Classical music==
*[[Agustín Barrios]] – ''La Catedral''
*[[George Enescu]] – [[Symphony No. 3 (Enescu)|Symphony No. 3]] in C major, Op. 21 (revised version)
*[[Gabriel Fauré]]
**[[Cello Sonata No. 2 (Fauré)|Cello Sonata No. 2]]
**[[Piano Quintet No. 2 (Fauré)|Piano Quintet No. 2]] in C minor, Op. 115
*[[John Foulds]] – ''[[A World Requiem]]'' (1919–21; premiered 1923)
*[[Howard Hanson]] – ''Before the Night''
*[[Albert Ketèlbey]]
**''[[Bells Across the Meadows]]''
**''[[In a Persian Market]]''
*[[Rued Langgaard]] – [[Symphony No. 6 (Langgaard)|Symphony No. 6]]
*[[Carl Nielsen]] – ''[[Moderen]]'' (stage music)
*[[Henrique Oswald]] – [[String Quartet No. 4 (Oswald)|String Quartet No. 4]] in C minor, Op. 46
*[[Willem Pijper]]
**Symphony No. 2
**Trio No. 2 for violin, violoncello & piano
*[[Sergei Prokofiev]] – [[Piano Concerto No. 3 (Prokofiev)|Piano Concerto No. 3]] in C Major
*[[Camille Saint-Saëns]]
**[[Oboe Sonata (Saint-Saëns)|Oboe Sonata]], Op. 166
**[[Clarinet Sonata (Saint-Saëns)|Clarinet Sonata]], Op. 167
**[[Bassoon Sonata (Saint-Saëns)|Bassoon Sonata]], Op. 168
*[[Edgard Varèse]]
**''[[Offrandes]]''
**''[[Amériques]]'' (1918–21)
*[[Ralph Vaughan Williams]]
**''[[The Lark Ascending (Vaughan Williams)|The Lark Ascending]]'', version for violin & orchestra
**''[[Pastoral Symphony (Vaughan Williams)|A Pastoral Symphony]]''
*[[Heitor Villa-Lobos]] – ''Fantasia de Movimentos Mistos'', for violin & orchestra
*[[Arnold Schoenberg]] – Suite for Piano Op. 25
*[[John Ireland (composer)|John Ireland]] – [[Two Pieces for Piano (1921)|Two Pieces for Piano]]