The Wisconsin Department of Military Affairs (DMA) is an agency of the Wisconsin state government responsible for maintaining Wisconsin's armed military force and responding to state or national emergencies.

The department headquarters are located at 2400 Wright Street, in Madison, on the grounds of the Dane County Regional Airport.

[2] The Department of Military Affairs was created by the 1967 Wisconsin government reorganization act, sponsored by governor Warren P. Knowles (1967 Wisconsin Act 75).

At the time, the agency was established to unify command of National Guard and the state Armory Board.

In 1989, the division of Emergency Management (also known as Wisconsin Emergency Management) was transferred to the Department of Military Affairs from the Department of Administration.