Wisconsin - Area of significance: Commerce
| Marshfield Central Avenue Historic District |
| Martens, Julius J., Company Building |
| Maryland Block |
| Mathias Mitchell Public Square-Main Street Historic District |
| Mazomanie Downtown Historic District |
| McClurg Building |
| McCormick-International Harvester Company Branch House |
| McMicken, Alexander Herschel and Pauline G., House |
| Mead Bank |
| Meissner Store |
| Melchoir Hotel and Brewery Ruins |
| Menomonie Downtown Historic District |
| Merchant Row Historic District |
| Merchants Avenue Historic District |
| Merritt, Samuel T., House |
| METEOR (Whaleback carrier) |
| Mills, Simeon, House |
| Milwaukee County Historical Center |
| Milwaukee News Building and Milwaukee Abstract Association Building |
| MILWAUKEE (steam screw) Shipwreck |
| Minnesota Block-Board of Trade Bldg. |
| Mitchell Building |
| MOJAVE Shipwreck (Barkentine) |
| Monroe Commercial District |
| Montello Commercial Historic District |
| MONTGOMERY shipwreck (schooner) |
| MOONLIGHT shipwreck |
| Mt. Horeb Opera Block |
| Myers, Peter, Pork Packing Plant and Willard Coleman Building |
| National Hotel |
| Neillsville Downtown Historic District |
| New Glarus Hotel |
| New Jersey Building |
| New Richmond Commercial Historic District |
| New Richmond West Side Historic District |
| New York Block |
| North Broadway Street Historic District |
| Northern Block |
| North Main Street Historic District |
| North Main Street Historic District |
| North Main Street Historic District |
| North Point Lighthouse |
| North Third Street Historic District |
| Northwest and XY Company Trading Post Sites |
| Northwestern Hotel |
| Oakland-Dousman Historic District |
| Ojibwa Courier Press Building |
| Old Main Street Historic District |
| Old World Third Street Historic District |
| Omaha Hotel |
| Orton Park Historic District |
| Osceola Commercial Historic District |
| Overton Archeological District |
| Owen, John and Margaret, House |
| Owen, William J., Store |
| Parkin Ice Cream Company |
| Parkview Historic District |
| PATHFINDER (schooner) Shipwreck |
| Pelican Lake Hotel |
| PEORIA Shipwreck (Schooner) |
| Peterson, Peter, House |
| Plankinton-Wells-Water Street Historic District |
| Plough Inn |
| Plum Island Range Rear Light |
| Pomeroy and Pelton Tobacco Warehouse |
| Portage Retail Historic District |
| Port Washington Downtown Historic District |
| Prange, Eliza, House |
| PRIDE Shipwreck (Schooner) |
| Princeton Downtown Historic District |
| Pritzlaff, John, Hardware Company |
| Puerner Block-Breunig's Brewery |
| Rawley Point Light Station |
| Redwood Cottage |
| Resthaven Hotel |
| ROBERT C. PRINGLE (tug) Shipwreck |
| Rock Island Historic District |
| Rolette House |
| Roosevelt, W. A., Company |
| Rosholt, John Gilbert, House |
| ROUSE SIMMONS (Shipwreck) |
| S.C. BALDWIN Shipwreck (barge) |
| Schlitz, Joseph, Brewing Company Saloon |
| Second Street Commercial District |
| SELAH CHAMBERLAIN (bulk carrier) Shipwreck |
| SENATOR (steam screw) Shipwreck |
| Shattuck, Franklyn C., House |
| Shawano Main Street Historic District |
| Shaw Point Historic District |
| Sheeley House |
| Sherwood Point Light Station |
| Shot Tower |
| SIDNEY O. NEFF Shipwreck (steambarge) |
| Siegner, George V., House |
| SILVER LAKE (scow-schooner) Shipwreck |
| Simeon Mills Historic District |
| Single, Benjamin, House |
| Sisson's Peony Gardens |
| Soo Line Depot |
| South First and Second Street Historic District |
Data from United States Park Service and Wikidata
