Wisconsin - Area of significance: Commerce
| South Main Street Historic District |
| South Main Street Historic District |
| South Main Street Historic District |
| State Bank of Ladysmith |
| State Bank of Wisconsin |
| Steensland, Halle, House |
| St. John Mine |
| St. Peter Shipwreck (Schooner) |
| Sturgeon Bay Canal Lighthouse |
| SUCCESS (scow schooner) Shipwreck |
| Sun Prairie Downtown Historic District |
| Sunshine Shipwreck (Scow Schooner) |
| Tainter, Louis Smith, House |
| Tainter, Mabel, Memorial Building |
| TENNIE AND LAURA (Shipwreck) |
| Tester and Polin General Merchandise Store |
| Teweles and Brandeis Grain Elevator |
| T. H. Camp (shipwreck) |
| Third Avenue Historic District |
| THOMAS FRIANT shipwreck (gill net tug) |
| Thomas, I. C., Drug Store |
| Thompson House Hotel |
| Thompson, Thomas Henry, House |
| Thorp, Freeman and Jesse, House and Cottages |
| Trade and Commerce Building |
| TRANSFER (self-unloading barge) Shipwreck |
| TRINIDAD Shipwreck (Schooner) |
| TUBAL CAIN (barque) Shipwreck |
| Underwriters Exchange Building |
| Union Auto Company |
| Union House Hotel |
| Upham, Gov. William H., House |
| Upper Main Street Historic District |
| Van Ostrand, Dewitt Clinton, House |
| Vilas, Joseph, Jr., House |
| Villa Louis |
| Viroqua Downtown Historic District |
| Vorous General Store |
| WALTER B. ALLEN (canaller) Shipwreck |
| WAR EAGLE Shipwreck (sidewheel steamboat) |
| Washington Avenue Historic District |
| Washington Block |
| Washington Highlands Historic District |
| Waterloo Downtown Historic District |
| Water Street Commercial Historic District |
| Water Street Commercial Historic District |
| Water Street Historic District |
| Watson Street Commercial Historic District |
| Waupun Commercial Historic District |
| Wegner, C. H., House |
| Welch, C. A., House |
| Welcker's Resort Historic District |
| Wemyss Building |
| West Bend Downtown Historic District |
| West Milwaukee Street Historic District |
| West Mitchell Street Commercial Historic District |
| West Second Street Historic District |
| West Side Commercial Historic District |
| White, F. F., Block |
| Whitewater Hotel |
| Whorton, John Hart, House |
| Wiedenbeck-Dobelin Warehouse |
| Windpoint Light Station |
| Winston-Cadotte Site |
| Wisconsin Avenue Historic District |
| Wisconsin Leather Company Building |
| WISCONSIN shipwreck (iron steamer) |
| Woodland Hotel |
| Yawkey, Cyrus C., House |
| Younglands |
Data from United States Park Service and Wikidata
