Supernumerary means "exceeding the usual number".

Supernumerary may also refer to:

Supernumerary actor, a performer in a film, television show, or stage production who has no role or purpose other than to appear in the background, more commonly referred to as an "extra"

Supernumerary body part, most commonly a congenital disorder involving the growth of an additional part of the body and a deviation from the body plan

Supernumerary judge, a semi-retired judge appointed to hear cases on a part-time basis

Supernumerary rainbow, extra colored bands sometimes seen inside the arc of a rainbow

Jewish Supernumerary Police, a Jewish militia active in the British Mandate of Palestine

Small supernumerary marker chromosome (sSMC), an extra, 47th autosomal chromosome

Supernumerary sex (or supernumerary gender), a gender category beyond male and female

Supernumerary town, a town in the Russian Empire which was not a center of an administrative subdivision of the state