Argentina, Brazil, Chile, Falkland Islands (Malvinas), Paraguay, Peru, South Georgia and the South Sandwich Islands, Uruguay (B).
Coastal southern Peru; extreme south-eastern Brazil; coastal central Chile east to southern Paraguay, north-eastern Argentina and Uruguay, and south to northern Tierra del Fuego. Also Falkland Is (formerly?). Erroneous records from northern Argentina based on confusion with Red-gartered Coot (Fulica armillata).
 
Population
Estimated population is 25,000 - 100,000 (2010).
Red-fronted Coot (Fulica rufifrons) [XC48556]
by Bernabe Lopez-Lanus from Estancia La Verdosa (San Enrique), Partido de 25 de Mayo, Buenos Aires, Argentina., Argentina (song)
Red-fronted Coot (Fulica rufifrons) [XC832258]
by id from Isla Teja, Valdivia, Chile (uncertain)