Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Trinidad and Tobago, USA, Venezuela.
Eastern Colombia through central-southern Venezuela to the Guianas and south to eastern Ecuador and northern Peru eastern across north-central Brazil; south-eastern Peru, northern Bolivia, western and central Brazil and central Paraguay to extreme northern Argentina; also extreme south-eastern Brazil.
 
Population
Estimated population is unknown (2010).
Azure Gallinule (Porphyrio flavirostris) [XC522731]
by Paul Lenrum\u00e9 from Barreira do Campo, Rio Araguaia, Santana do Araguaia, Par\u00e1, Brazil (call)
Azure Gallinule (Porphyrio flavirostris) [XC108235]
by Olivier Claessens from Estancia La Clarita, Ruta 40 entre 41 y 42, Galarza, Corrientes, Argentina (call)
Subspecies
Formerly listed as Porphyrio parvus, but this name preoccupied. Sometimes placed in Gallinula or Porphyrula.