List of compositions by Frederick Delius

The musical compositions of Frederick Delius (1862–1934) cover numerous genres, in a style that developed from the early influences of composers such as Edvard Grieg and Richard Wagner into a voice that was uniquely Delius's. He began serious composition at a relatively advanced age (his earliest songs date to his early twenties), and his music was largely unknown and unperformed until the early 20th century. It was a further ten years before his work was generally accepted in concert halls, and then more often in Europe than in his home country, England. Ill-health caused him to give up composition in the early 1920s and he was silent for several years, before the services of a devoted amanuensis, Eric Fenby, enabled Delius to resume composing in 1928. The Delius-Fenby combination led to several notable late works.

Chronological list of principal works
The "principal" works are those identified as such by Eric Fenby. A division of Delius's work into phases such as "apprentice" and "middle period" has been suggested by many commentators, notably Anthony Payne in "Delius's Stylistic Development" (1962).

Apprentice works, 1887–1899

 * 1887: Florida Suite
 * 1890–92: (Opera) Irmelin
 * 1893–95: (Opera) The Magic Fountain
 * 1895–97: (Opera) Koanga
 * 1897: (Incidental music) Folkeraadet (Norwegian Suite)
 * 1897: Concerto for piano and orchestra (original version)
 * 1899: Paris: The Song of a Great City

"Middle period" works, 1900–06

 * 1900–01: (Opera) A Village Romeo and Juliet
 * (Orchestral interlude between Scenes 5 and 6) "The Walk to the Paradise Garden"
 * 1902: (Opera) Margot-la-Rouge
 * 1903: Appalachia: Variations on a Slave Song
 * 1903–04: Sea Drift (setting of a poem by Walt Whitman)
 * 1904–05: A Mass of Life (text by Friedrich Nietzsche)
 * 1906: Concerto for piano and orchestra (with revised first movement)
 * 1906–07: Songs of Sunset (poems by Ernest Dowson)

Mature works, 1907–24

 * 1907: Brigg Fair
 * 1908: In a Summer Garden
 * 1909–10: (Opera) Fennimore and Gerda
 * 1911: An Arabesque (poems by Jens Peter Jacobsen)
 * 1911: A Song of the High Hills (wordless chorus)
 * 1911–12: Summer Night on the River
 * 1911–12: On Hearing the First Cuckoo in Spring
 * 1912: Life's Dance (revised from 1899 symphonic poem La ronde se déroule)
 * 1913–14: North Country Sketches
 * 1914: Sonata for violin and piano No. 1 (begun 1905)
 * 1914–16: Requiem (text by Heinrich Simon)
 * 1915: Double Concerto for violin, cello and orchestra
 * 1916: Concerto for violin and orchestra
 * 1916: Dance Rhapsody No. 2
 * 1916: String Quartet
 * 1916: Sonata for cello and piano
 * 1917: Eventyr (Once Upon a Time)
 * 1918: A Song Before Sunrise
 * 1920–23: (Incidental music) Hassan (play by James Elroy Flecker)
 * 1921: Cello Concerto
 * 1923: Sonata for violin and piano No. 2

Late works

 * 1929–30: A Song of Summer
 * 1930: Sonata for violin and piano No. 3
 * 1930: Songs of Farewell (setting of poems by Walt Whitman)

List of works by genre
A definitive catalogue of the works of Delius was produced by Robert Threlfall in 1977, and a supplement to it in 1986. It is abbreviated as RT. The Threlfall sectioning is a categorization where works are assigned nominal numbers according to a roman-numeric genre numbering scheme. For example, A Village Romeo and Juliet is, according to Threlfall's counting, the sixth piece of dramatic work Delius composed. Thus, the piece is in Section I, number 6, so is designated RT I/6.