Argentina (B), Bolivia (B), Brazil (NB), Colombia (NB), Panama (NB), Paraguay (B), Peru (NB), Uruguay (B).
Breeds in southern Bolivia (southern from central Cochabamba and western Santa Cruz) and much of Argentina (generally south to Chubut); migrates north to western Amazonia.
 
Population
Estimated population is unknown (2011).
Southern Martin (Progne elegans) [XC620880]
by Richard E. Webster from North-east of La Para, Mar Chiquita, C\u00f3rdoba, Argentina (call)
Southern Martin (Progne elegans) [XC396792]
by Rosendo Fraga from Peninsula Valdes, Chubut, Argentina (call)
Subspecies
No subspecies.
Progne modesta (Sibley and Monroe 1990, 1993) has been split into Southern Martin (Progne modesta), Peruvian Martin (Progne murphyi) and Southern Martin (Progne elegans) following SACC (2005).
Forms a superspecies with others of genus apart from Brown-chested Martin (Progne tapera). Sometimes treated as subspecies of Southern Martin (Progne modesta). Hybrids with Grey-breasted Martin (Progne chalybea) recorded in north-western Argentina.