List of musical instruments by transposition

Transposing instruments are most commonly found in D, E-flat, F, G, A and B-flat.

Instruments in D-flat, E, A-flat and B do or did exist but are uncommon or obsolete.

Instruments in G-flat are completely lacking (leaving aside French horns with crooks which come in any key).

The instruments that are available nowadays in the greatest number of keys (again leaving aside historical French horns with crooks) are trumpets and clarinets.

Authorities disagree on whether instruments in this category are properly called "transposing", but they are included here for completeness.

Note: This section is only for instruments which are non-transposing members of families of transposing instruments. This section should not become a list of all instruments in existence which happen to be non-transposing.

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