Locally in eastern Colombia (Meta), southern Venezuela (extreme western Amazonas), and from eastern Ecuador and north-eastern and eastern Peru eastern across central Brazil (east to extreme western Maranhío and northern Tocantins, extending north of R Amazon only in area west of lower R Negro and also north-east of Manaus) and south to Mato Grosso and north-western and north-eastern Bolivia.
 
Population
Estimated population is unknown (2010).
Amazonian Streaked Antwren (Myrmotherula multostriata) [XC816931]
by JAYRSON ARAUJO DE OLIVEIRA from Aragua\u00edna, Tocantins Ch\u00e1cara do Pedro Araujo, Brazil (call)
Amazonian Streaked Antwren (Myrmotherula multostriata) [XC296592]
by Jeremy Minns from R\u2019o Yanayacu area near Muyuna lodge, Loreto, Peru (call)
Subspecies
Myrmotherula surinamensis (Sibley and Monroe 1990, 1993) has been split into Guianan Streaked Antwren (Myrmotherula surinamensis), Pacific Antwren (Myrmotherula pacifica) and Amazonian Streaked Antwren (Myrmotherula multostriata) following SACC (2005).
Considered a sister-species of Guianan Streaked Antwren (Myrmotherula surinamensis) and until recently was treated as conspecific with that and also with Pacific Antwren (Myrmotherula pacifica), but vocal and plumage characters indicate that they represent three separate species. Genetic and morphological analyses indicate that all are part of a monophyletic group that also includes Pygmy Antwren (Myrmotherula brachyura), Moustached Antwren (Myrmotherula ignota), Cherrie's Antwren (Myrmotherula cherriei), Klages's Antwren (Myrmotherula klagesi), Stripe-chested Antwren (Myrmotherula longicauda), Sclater's Antwren (Myrmotherula sclateri) and Yellow-throated Antwren (Myrmotherula ambigua) (the "streaked antwren assemblage").