Eastern and south-eastern Brazil (from eastern Bahia southern along coast to northern Rio Grande do Sul, extending inland to southern Goiás, western Paraná and western Santa Catarina) and eastern and central Paraguay and north-eastern Argentina (Misiones and north-eastern Corrientes).
 
Population
Estimated population is unknown (2011).
Plain-winged Woodcreeper (Dendrocincla turdina) [XC875430]
by id from Guaratuba, Paran\u00e1, Brazil (song)
Plain-winged Woodcreeper (Dendrocincla turdina) [XC345409]
by Dante Buzzetti from Ubatuba, SP. Folha Seca, Brazil (song)
Subspecies
Plain-brown Woodcreeper (Dendrocincla fuliginosa) and Plain-winged Woodcreeper (Dendrocincla turdina) (Sibley and Monroe 1990, 1993) have been lumped into Dendrocincla fuliginosa following SACC (2005).
Forms a superspecies with Plain-brown Woodcreeper (Dendrocincla fuliginosa), and often regarded as conspecific. Subspecies atrirostris of Plain-brown Woodcreeper (Dendrocincla fuliginosa) considered by some authors to be better placed with present species on basis of vocalizations and presence of crown streaking. Birds from south of range named as subspecies enalincia, but characters on which description based are obscured by marked individual variation in both size and plumage coloration throughout species' range.
The following 2 subspecies are recognised:
taunayi Pinto, 1939 - North-eastern Brazil (eastern Pernambuco, eastern Alagoas). Considered by some authors to be a subspecies of Plain-brown Woodcreeper (Dendrocincla fuliginosa).