Wisconsin - Area of significance: Architecture
| Hotel Schroeder |
| Hotel Wausau |
| Hotel Whiting |
| Howie, David W., House |
| Hoyt, Frank W., Park |
| Hudson Public Library |
| Hugunin, John and Martha, House |
| Hulburt, C.D., House |
| Hultin, Nicolaus H., House |
| Humphrey, Herman L., House |
| Hunt,Samuel, House |
| Hunt, W. Ben, Cabin |
| Huron Street Historic District |
| Huson, Henry H., House and Water Tower |
| Hutchinson Memorial Library |
| Hyde Chapel |
| Hyer's Hotel |
| Ihm House |
| Imig, Henry and Charles, Block |
| Immanuel Presbyterian Church |
| Independence City Hall |
| Ingalsbe, Adolphus and Sarah, House |
| Ingebretson, Gaute, Loft House |
| Iowa County Courthouse |
| Iowa Street Historic District |
| Iron Block |
| Irving Church Historic District |
| Isermann, Anthony and Caroline, House |
| Isermann, Frank and Jane, House |
| Island Lake Camp |
| Island of Happy Days |
| Island Woolen Company Office Building |
| Iverson-Johnson House |
| Jabodon |
| Jackman Building |
| Jackson House |
| Jacobs, Herbert A., House |
| Jacobs, Herbert and Katherine, First House |
| Jacobs, Herbert and Katherine, Second House |
| Jacobs, Herbert, Second House |
| Jahn, William F., Farmstead |
| James, Samuel D., House |
| Janesville High School |
| Janesville Public Library |
| Jefferson Avenue Historic District |
| Jefferson Fire Station |
| Jefferson High School |
| Jefferson Public Library |
| Jenifer-Spaight Historic District |
| Jenkins, Halbert D., House |
| Jennings, Ellis, House |
| Jensen, J. L., House |
| Jensen, Matt and Lena, House |
| Jensen, Tollef, House |
| Jensvold, Gulbrand and Bertha, House |
| Jischke's Meat Market |
| Johnson, Albin, Log House |
| Johnson, A.P., House |
| Johnson, August, House |
| Johnson, Dr. Samuel C., House |
| Johnson, Herbert F., House |
| Johnson, Isabel and Orrin, House |
| Johnson, John, Saloon |
| Johnson, Matt, Log House |
| Johnson, Peter, House |
| Johnson, S.C., and Son Administration Building and Research Tower |
| Johnston Hall |
| Johnston, William, Lime Kiln |
| Joint Brussels and Garner Dristrict School Number One |
| Jollywood |
| Jones, David J. and Maggie, House |
| Jones, Fred B., Estate |
| Jones, Granville D., House |
| Jones, John A. and Maggie, House |
| Jones, John H., House |
| Jones, Robert O., House |
| Jones, Samuel S., Cobblestone House |
| Jump River Town Hall |
| Juneau, Solomon and Josette, House |
| Jung Carriage Factory |
| Jung Shoe Manufacturing Company Factory |
| Kaiser Lumber Company Office |
| Kaiser's |
| Kalvelage, Joseph B., House |
| Kane, Sanford R., House |
| Kane Street Historic District |
| Kayser, Adolph H., House |
| Keefe, Franklin E. and Eva E., House |
| Kegel's Inn |
| Kehl Winery |
| Kelliher, Michael, House |
| Kellogg Public Library and Neville Public Museum |
| Kell, William H., House |
| Kemper Hall |
| Kemp, John and Margarethe, Cabin |
| Kendall-Blankenburg House |
| Kendalls Depot |
| Kenosha County Courthouse and Jail |
| Kenosha Elks Club |
| Kenosha North Pierhead Light |
Data from United States Park Service and Wikidata
