- Wozzeck (baritone)
Marie, his common-law wife (soprano)
Marie's Son (treble)
Captain (buffo tenor)
Doctor (buffo bass)
Drum Major (heldentenor)
Andres, Wozzeck's friend (lyric tenor)
Margret, Marie's Neighbor (contralto)
First Apprentice (deep bass)
Second Apprentice (high baritone)
Madman (high tenor)
Mixed Chorus (SATB)
- Soldiers, Apprentices, Women and Children
- 4 flutes (all also piccolos), 4 oboes (4th also English horn),
- 4 clarinets (3rd and 4th also E♭ clarinet),
bass clarinet, 3 bassoons, contrabassoon.
- 4 horns, 4 trumpets 4 trombones (alto, 2 tenor, bass), tuba.
timpani (4 drums), bass drum, cymbals (a pair, suspended, one attached to bass drum),
bass drum (with switch), snare drum, 2 tam-tams (large and small), triangle,
xylophone, celesta, harp, strings
- Marching Band (Act I, sc.3)
- piccolo, 2 flutes, 2 oboes, 2 E♭ clarinets, 2 bassoons
2 horns, 2 trumpets, 3 trombones, tuba
bass drum with cymbals, snare drum, triangle.
- Tavern band (Act II, sc.4)
- clarinet in C, bombardon in F (or muted tuba), accordion, guitar, 2 fiddles (steel strings, scordatura)
- Upright out-of-tune piano (Act III, sc.3)
- *In his instructions, Berg says the players in the marching band may be taken from the main orchestra, and even goes so far as to indicate exactly where the players can leave with a footnote near the end of Act I, sc.2. In addition to the instrumental groups which appear on stage, Berg also asks for a chamber orchestra in Act II, sc.3, which should if possible be composed of additional players and separated from the main pit orchestra. The chamber orchestra instrumentation explicitly matches that of Schoenberg's Chamber Symphony No.1.
- flute (also piccolo), oboe, English horn, E♭ clarinet, clarinet,
bass clarinet, bassoon, contrabassoon, 2 horns, strings