Whitefish Bay National Guard Armory was located at 1225 East Henry Clay Street, on six acres of land at the southwest corner of Henry Clay Street and Ardmore Avenue, in Whitefish Bay, Wisconsin. The red brick building with crenelated top and central tower was called "the finest armory in the state". Inside were well-lit classrooms off wide terrazzo corridors, double staircase with ornate ogee window, gymnasium, kitchen, and lounge with beamed ceiling and mammoth fireplace. Built in 1928, it was designed by prolific local architect Herbert W. Tullgren.