Middle Military District (Swedish: Mellersta militärområdet, Milo M) was a Swedish military district, a command of the Swedish Armed Forces that had operational control over Middle Sweden, for most time of its existence corresponding to the area covered by the counties of Östergötland, Södermanland, Stockholm, Uppsala, Västmanland, Örebro, Värmland, Kopparberg (now Dalarna County) and Gävleborg.

In 2000, these last three military districts were disbanded and the command for the whole of Sweden was placed at the Swedish Armed Forces Headquarters, in accordance with the Defence Act of 2000.

The coat of arms of the Middle Military District Staff 1991–2000.

Blazon: "Or, the provincial badge of Södermanland, a griffon segreant sable, armed and langued gules, on a chief azur three open crowns fesswise or.

"[2] In 2000, the Mellersta militärområdesstabens (MilostabM) minnesmedalj ("Middle Military District Staff (MilostabM) Commemorative Medal") in silver (MiloMSMM) of the 8th size was established.