Brazil (southern Pará, southern Maranhío, southern Piauí and western Bahia south to Mato Grosso do Sul and north-eastern Paraná), extreme central-eastern and north-eastern Paraguay (Concepción and Canindeyú) and extreme eastern Bolivia (north-eastern Santa Cruz).
 
Population
Estimated population is unknown (2010).
Curl-crested Jay (Cyanocorax cristatellus) [XC186206]
by Kassius Santos from Extrema, Minas Gerais,, Brazil (call, flight call)
Curl-crested Jay (Cyanocorax cristatellus) [XC793195]
by JAYRSON ARAUJO DE OLIVEIRA from Monte Alegre, Comunidade Tinguizal Kalunga, Goi\u00e1s, Brazil (song)
Subspecies
No subspecies.
Formerly placed in a monotypic genus, Uroleuca. Has been thought to form a superspecies with Violaceous Jay (Cyanocorax violaceus), Purplish Jay (Cyanocorax cyanomelas) and Azure Jay (Cyanocorax coeruleus).