Counties in Montana

• Beaverhead (18 historic properties)
• Big Horn (39 historic properties)
• Blaine (6 historic properties)
• Broadwater (7 historic properties)
• Carbon (61 historic properties)
• Cascade (41 historic properties)
• Chouteau (19 historic properties)
• Custer (17 historic properties)
• Daniels (3 historic properties)
• Dawson (13 historic properties)
• Deer Lodge (32 historic properties)
• Fallon (2 historic properties)
• Fergus (40 historic properties)
• Flathead (149 historic properties)
• Gallatin (102 historic properties)
• Garfield (1 historic property)
• Glacier (23 historic properties)
• Golden Valley (5 historic properties)
• Granite (11 historic properties)
• Hill (9 historic properties)
• Jefferson (6 historic properties)
• Judith Basin (3 historic properties)
• Lake (9 historic properties)
• Lewis and Clark (65 historic properties)
• Liberty (2 historic properties)
• Lincoln (6 historic properties)
• Madison (17 historic properties)
• McCone (2 historic properties)

• Meagher (5 historic properties)
• Mineral (15 historic properties)
• Missoula (80 historic properties)
• Musselshell (2 historic properties)
• Park (26 historic properties)
• Petroleum (3 historic properties)
• Phillips (4 historic properties)
• Pondera (4 historic properties)
• Powder River (2 historic properties)
• Powell (16 historic properties)
• Prairie (3 historic properties)
• Ravalli (84 historic properties)
• Richland (2 historic properties)
• Roosevelt (2 historic properties)
• Rosebud (20 historic properties)
• Sanders (21 historic properties)
• Sheridan (7 historic properties)
• Silver Bow (17 historic properties)
• Stillwater (11 historic properties)
• Sweet Grass (8 historic properties)
• Teton (1 historic property)
• Toole (6 historic properties)
• Treasure (3 historic properties)
• Valley (13 historic properties)
• Wheatland (2 historic properties)
• Wibaux (4 historic properties)
• Yellowstone (29 historic properties)