I have composed hundreds of works, and I thank Koechel for cataloging many of them.
Symphonies I wrote in my youth:
Symphony No. 1 in E-flat major, Symphony No. 2 in B-flat major, Symphony No. 3 in E-flat major, Symphony No. 4 in D major, Symphony No. 5 in B-flat major, Symphony No. 6 in F major, Symphony No. 7 in D major,Symphony No. 8 in D major, Symphony No. 9 in C major, Symphony No. 10 in G major, Symphony No. 11 in D major, Symphony No. 12 in G major, Symphony No. 13 in F major,Symphony No. 14 in A major
Salzburg Era Symphonies:
Symphony No. 15 in G major, Symphony No. 16 in C major, Symphony No. 17 in G major, Symphony No. 18 in F major, Symphony No. 19 in E-flat major, Symphony No. 20 in D major, Symphony No. 21 in A major, Symphony No. 22 in C major, Symphony No. 23 in D major, Symphony No. 24 in B-flat major, Symphony No. 25 in G minor, Symphony No. 26 in E-flat major, Symphony No. 27 in G major, Symphony No. 28 in C major, Symphony No. 29 in A major, Symphony No. 30 in D major
Late Symphonies:
Symphony No. 31 in D major, Symphony No. 32 "Overture in the Italian style" in G major, Symphony No. 33 in B-flat major, Symphony No. 34 in C major, Symphony No. 35 "Haffner" in D major, Symphony No. 36 "Linz" in C major,Symphony No. 37 in G major, Symphony No. 38 "Prague" in D major, Symphony No. 39 in E flat major, Symphony No. 40 in G minor, Symphony No. 41 "Jupiter" in C major
Piano Concertos:
Piano Concerto No. 9 "Jeunehomme" in E flat major, Piano Concerto No. 11 in F major, Piano Concerto No. 12 in A major, Piano Concerto No. 13 in C major, Piano Concerto No. 14 in E flat major, Piano Concerto No. 15 in B flat major, Piano Concerto No. 16 in D major, Piano Concerto No. 17 in G major, Piano Concerto No. 18 in B flat major, Piano Concerto No. 19 "Coronation I" in F major, Piano Concerto No. 20 in D minor, Piano Concerto No. 21 in C major, Piano Concerto No. 22 in E flat major, Piano Concerto No. 23 in A major, Piano Concerto No. 24 in C minor, Piano Concerto No. 25 in C major, Piano Concerto No. 26 "Coronation II" in D major, Piano Concerto No. 27 in B flat major
Violin Concertos:
Violin Concerto No. 1 in B flat major, Violin Concerto No. 2 in D major, Violin Concerto No. 3 in G major, Violin Concerto No. 4 in D major, Violin Concerto No. 5 in A major
Horn Concertos:
Horn Concerto No. 1 in D major, Horn Concerto No. 2 in E flat major, Horn Concerto No. 3 in E flat major, Horn Concerto No. 4 in E flat major
Other Concertos:
Bassoon Concerto in B flat major, Oboe Concerto in C major, Sinfonia Concertante for Oboe, Clarinet, Horn, Bassoon and Orchestra, Concerto for Clarinet and Orchestra in A major, Flute Concerto No. 1 in G Major, Flute Concerto No. 2 in D Major, Andante for Flute and Orchestra in C Major
Concertante Symphonies:
Sinfonia Concertante for Violin, Viola and Orchestra in E flat major, Sinfonia Concertante for Oboe, Clarinet, Horn and Basson in E flat major
Solo Piano Music:
Andante in C, Allegro in C, Allegro in F, Minuet in F, Minuet in G, Minuet in C, Minuet in F, Allegro in B-flat, Minuet in F, Minuet in F, Allegro in C, Andante in B-flat, Piano Sonata No. 1 in C major, Piano Sonata No. 2 in F major, Piano Sonata No. 3 in B-flat major, Piano Sonata No. 4 in E-flat major, Piano Sonata No. 5 in G major, Piano Sonata No. 6 in D major, Piano Sonata No. 7 in C major, Piano Sonata No. 8 in A minor, Piano Sonata No. 9 in D major, Piano Sonata No. 10 in C major, Piano Sonata No. 11 "Turkish March" in A major, Piano Sonata No. 12 in F major, Piano Sonata No. 13 in B-flat major, Piano Sonata No. 14 in C minor, Piano Sonata No. 15 in F Major, Piano Sonata No. 16 in C Major, Piano Sonata No. 17 in F Major, Piano Sonata No. 18 in B-flat Major, Piano Sonata No. 19 in D Major, Fantasy No. 1 with Fugue in C major, Fantasy No. 2 in C minor, Fantasy No. 3 in D minor, Fantasy No. 4 in C minor
String Quartets:
String Quartet No. 1 in G major, String Quartet No. 2 in D major, String Quartet No. 3 in G major, String Quartet No. 4 in C major, String Quartet No. 5 in F major, String Quartet No. 6 in B-flat major, String Quartet No. 7 in E-flat major, String Quartet No. 8 in F major, String Quartet No. 9 in A major, String Quartet No. 10 in C major, String Quartet No. 11 in E-flat major, String Quartet No. 12 in B-flat major, String Quartet No. 13 in D minor, String Quartet No. 14 in G major, String Quartet No. 15 in D minor, String Quartet No. 16 in E flat major, String Quartet No. 17 in B flat major, String Quartet No. 18 in A major, String Quartet No. 19 in C major ("Dissonance"), String Quartet No. 20 in D major, String Quartet No. 21 in D major, String Quartet No. 22 in B flat major, String Quartet No. 23 in F major
String Quintets:
String quintet in B flat major, String quintet in C major, String quintet in G minor, String quintet in C minor, String quintet in D major, String quintet in E flat major
Other Chamber Music:
Quartets with flute (flute, violin, viola, cello), Quintet for piano and winds (oboe, clarinet, horn, bassoon), Clarinet Quintet, Clarinet trio (clarinet, viola, piano)
Serenades and Other Instrumental Works:
Eine kleine Nachtmusik, Serenade for Thirteen Wind Instruments, Divertimenti, Divertimenti for two horns and strings Ein Musikalischer Spass
Masses:
Krnungsmesse "Coronation Mass" in C major, Great Mass in C minor, Requiem in D minor
Other Sacred Music:
Exsultate jubilate, Ave verum Corpus
Operas:
Die Schuldigkeit des ersten Gebotes, Apollo et Hyacinthus, Bastien et Bastienne, La finta semplice, Mitridate re del Ponto, Ascanio in Alba, Betulia Liberata, an oratorio, Il sogno di Scipione, Lucio Silla, Thamos, Knig in gypten, La finta giardiniera, Il r pastore, Zaide, Idomeneo, Die Entfhrung aus dem Serail, L'oca del Cairo, Lo sposo deluso, Der Schauspieldirektor, Le nozze di Figaro, Don Giovanni, Cos fan tutte, Die Zauberflte, La Clemenza di Tito