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
Dutch pacification campaign on Formosa never before been witnessed in this country, as one tribe was nearly always waging war against another." The net effect of the Dutch campaign was a "pax Hollandica" (Dutch peace), assuring VOC control in the southwest of the island. The Dutch called their new area of control the "Verenigde Dorpen" (United Villages), a deliberate allusion to the United Provinces of their homeland. The campaign was vital to the success and growth of the Dutch colony, which had operated as more of a trading post than a true colony until that point. In 1629, the third governor of Dutch Formosa, Pieter