Wisconsin - Significance region: Local
| Brown-Sewell House |
| Brule-St. Croix Portage |
| Bucholtz, Carl and Clara, Farmstead |
| Buckley, Patrick J., House |
| Buemming, Herman W., House |
| Bullhead Point Historical and Archeological District |
| Burlington Cemetery Chapel |
| Burlington Community Swimming Pools and Bathhouse |
| Burlington Downtown Historic District |
| Burlington Hotel |
| Burnett County Abstract Company |
| Burnham, J. L., Block |
| Burr Oak Tavern |
| Byrns, Daniel and Nellie, House |
| Cade Archeological District |
| Cadiz Township Joint District No. 2 School |
| Caledonia Street Commercial Historic District |
| California Wine and Liquor Store |
| Calkins, Elias A., Doublehouse |
| Callahan, John L., House |
| Calumet County Courthouse |
| Calumet County Park Group |
| Calvary Presbyterian Church |
| Calway, Forrest D. and Marian, House |
| Cambridge Public School and High School |
| Campbell, John G., House |
| Camp Five Farmstead |
| Camp, Thomas, Farmhouse |
| Cance, John, F., House |
| Caples' Park Historic District |
| Cardinal Hotel |
| Carnegie Free Library |
| Carpenter, Michael, House |
| Carson Park Baseball Stadium |
| Carved Cave |
| Cass and King Street Residential Historic District |
| Cassidy Farmhouse |
| Cass-Juneau Street Historic District |
| Cass-Wells Street Historic District |
| Castleman, Dr. Alfred L., House |
| Cedarburg Woolen Co. Worsted Mill |
| Center Avenue Historic District |
| Center Valley Grade School |
| Central Park Historic District |
| Central Wisconsin State Fair Round Barn |
| Century Building |
| Chadbourn, F. A., House |
| Chamberlin, Clarence, House |
| Chambers Island Lighthouse |
| Chambers-Markle Farmstead |
| Chandler, Walter S., House |
| Chapel of St. Mary the Virgin |
| Chapple and MacArthur Avenues Residential Historic District |
| Chase Grain Elevator |
| Chautauqua Grounds Site |
| Chicago and Norhwestern Railroad Depot |
| Chicago and North Western Depot |
| Chicago and North-Western Land Office |
| Chicago and Northwestern Railroad Depot |
| Chicago and Northwestern Railroad Passenger Depot |
| Chicago and North Western Railway Passenger Depot |
| Chicago and Northwest Railroad Passenger Station |
| Chicago, Milwaukee and Saint Paul Railroad Depot |
| Chicago, Milwaukee and Saint Paul Railway Passenger Depot |
| Chicago, Milwaukee and St. Paul Railway Company Passenger Depot |
| Chicago, St. Paul, Minneapolis and Omaha Railroad Car Shop Historic District |
| Chicago, St. Paul, Minneapolis and Omaha Railroad Passsenger Station |
| Chicago, St. Paul, Minneapolis & Omaha Railroad Depot |
| Chief Lippert Fire Station |
| Chilton Post Office |
| Chippewa Shoe Manufacturing Company |
| Christ Church Cathedral and Parish House |
| Christ Church of LaCrosse |
| Christ Episcopal Church |
| Christ Episcopal Church Complex |
| Christ Evangelical Church |
| Christ Evangelical Lutheran Church |
| Christ Evangelical Lutheran Church of Burr Oak |
| CHRISTINA NILSSON (shipwreck) |
| Church Hill Historic District |
| Church of St. Thomas the Apostle |
| Church of the Atonement |
| Church Street Historic District |
| Chute Pond Dam |
| Cipra Wayside Mound Group |
| Citizens Bank |
| Citizens State Bank of Gillett |
| City Hall |
| City Hotel |
| City Market |
| City of Beloit Waterworks and Pump Station |
| Civic Center Historic District |
| Claflin Point Site |
| Clark-Brown House |
| Clark County Jail |
| Clarke, Bascom B., House |
| Clarke, George Lawrence Jr., House |
| Clark, Jonathan, House |
| Clark Street-Main Street Historic District |
| Clark, William, House |
Data from United States Park Service and Wikidata
