Connecticut - Area of significance: Industry
| House at 130 Hayden Station Road |
| House at 130 Mohegan Avenue |
| House at 44 Court Street |
| House at 736 Palisado Avenue |
| Howe, John I., House |
| Hurwood Company |
| Jillson, William, Stone House |
| Kent Iron Furnace |
| Kraus Corset Factory |
| L. A. DUNTON |
| Lakeville Historic District |
| Landers, Frary and Clark Ellis Street Plant Historic District |
| Lawton Mills Historic District |
| Le Roy Shirt Company Factory |
| Lime Rock Historic District |
| Long Ridge Village Historic District |
| Loomis, Capt. James, House |
| Loomis, Col. James, House |
| Loomis, George G., House |
| Loomis, Gordon, House |
| Loomis, Ira, Jr., House |
| Loth, Joseph, Company Building |
| Lyman, David, II, House |
| Magill, Henry, House |
| Main Sawmill |
| Main Street Historic District |
| Main Street Historic District |
| Maltby-Stevens Factory Site |
| Manchester Historic District |
| Mansfield Hollow Historic District |
| Matthews and Willard Factory |
| Mechanic Street Historic District |
| Melrose Road Bridge |
| Meriden Curtain Fixture Company Factory |
| Mills, Oliver W., House |
| Mills, Timothy Dwight, House |
| Milton Center Historic District |
| Minortown Road Bridge |
| Minterburn Mill |
| Montgomery, J.R., Company Industrial Complex |
| Moore, Edward and Ann, House |
| Moore Jr., William, House |
| Mount Riga Ironworks Site |
| Murphy, Patrick, House |
| Mystic Bridge Historic District |
| New England Cement Company Kiln and Quarry |
| New England Hebrew Farmers of the Emanuel Society Synagogue and Creamery Site |
| New Haven Clock Company Factory |
| New Milford Center Historic District |
| New Roxbury Ironworks Site |
| New York Belting and Packing Co. |
| Nichols Satinet Mill Site |
| Noank Historic District |
| Norcross Brothers Granite Quarry |
| Northfield Knife Company Site |
| North Grosvenordale Mill Historic Disrict |
| North Stonington Village Historic District |
| Norton, Charles H., House |
| Occum Hydroelectric Plant and Dam |
| Oil Mill Historic District |
| Old Mine Park Archeological Site |
| Parker-Hutchinson Farm |
| Parkville Historic District |
| Park, William, House |
| Payne, Daniel, House |
| Peck, Stow & Wilcox Factory |
| Phelps, Eli, House |
| Pistol Factory Dwelling |
| Pitkin, Elisha, House |
| Pitkin Glassworks Ruin |
| Plainfield Woolen Company Mill |
| Plymouth Center Historic District |
| Poquetanuck Village Historic District |
| Pratt House |
| Pratt, Read and Company Factory Complex |
| Pultz & Walkley Company |
| Quinebaug Mill-Quebec Square Historic District |
| Quinnipiac Brewery |
| Railroad Avenue Industrial District |
| Red Bridge |
| River Street Historic District |
| Riverton Historic District |
| Robinson, P., Fur Cutting Company |
| Rock Ledge |
| Rockrimmon Rockshelter |
| Rockville Historic District |
| Roxbury Center |
| Roxbury Iron Mine and Furnace Complex |
| Royal Typewriter Company Building |
| Russell Company Upper Mill |
| Sanford-Humphreys House |
| Sanseer Mill |
| Saxony Mill |
| Selleck, Sylvanus, Gristmill |
| Sharon Valley Historic District |
| Sheffield Street Bridge |
| Shelton, William, House |
| Silvermine Center Historic District |
| Simeon North Factory Site |
| Simpson, Samuel, House |
Data from United States Park Service and Wikidata
