Southern Amazonian Brazil, south of Amazon, from R Madeira east to R Tapajós and its headwaters at R Juruena, southern at least to Rondônia and south-western Mato Grosso (southern limit of range unclear). Alleged records farther eastern (to lower R Xingu) appear to refer to mislabelled specimens.
 
Population
Estimated population is unknown (2010).
Hoffmanns's Woodcreeper (Dendrocolaptes hoffmannsi) [XC556281]
by id from Tabajara - Igarap\u00e9 do Marmelo - MD do Machado, Brazil (canto)
Hoffmanns's Woodcreeper (Dendrocolaptes hoffmannsi) [XC664476]
by Jeremy Minns from Igarap\u00e9 S\u00e3o Jos\u00e9, Parque Nacional da Amaz\u00f4nia, Itaituba, Par\u00e1, Brazil (call, song, aggressive call)
Subspecies
No subspecies.
Apparently forms a superspecies with Black-banded Woodcreeper (Dendrocolaptes picumnus) and suggested as conspecific by some authors, and with Planalto Woodcreeper (Dendrocolaptes platyrostris), being closely allied to both based on vocal and behavioural characters combined with biogeographical patterns. Allied with Western Barred Woodcreeper (Dendrocolaptes sanctithomae) and Amazonian Barred Woodcreeper (Dendrocolaptes certhia) in one phylogenetic study on basis of anatomical characters.