Akodon spegazzinii is found in northwestern Argentina, in the provinces of Salta, Catamarca, Tucumán, La Rioja, and Mendoza, at altitudes of . Although its main distribution is in the northern provinces of Salta, Tucumán, and Catamarca, there are also scattered records from the more southern provinces of La Rioja and Mendoza, where it is likely restricted to patches of wet habitat. "Akodon alterus" has been reported from Jujuy, but this record was likely based on misidentified specimens of "A. boliviensis", and records of "Akodon spegazzinii" from Jujuy were based on misidentified "A. sylvanus". "Akodon spegazzinii" is known from a paleontological site in
Provinces of Peru country. The province with the fewest districts is Purús Province, with just one district. The province with the most districts is Lima Province, with 43 districts. The most common number of districts per province is eight, a total of 29 provinces share this number of districts. The table below shows all provinces with their capitals and the region in which they are located. The UBIGEO code uniquely identifies each province. Capitals in bold are also a regional capital. Provinces in which the region's capital is located all have an UBIGEO code ending in codice_1. Provinces of Peru The provinces of