New Hampshire - Criteria: C (architecture/engineering)
| Town Center Historic District |
| Town Hall |
| Town Hall and Courthouse |
| Town House |
| Townsend Farm |
| Townsend, Jabez, House |
| Trinity Church |
| Trinity Church |
| Troy Village Historic District |
| Tucker Mountain Schoolhouse |
| Tuftonboro United Methodist Church |
| Tuttle, Donald D., House |
| Union Chapel |
| Union Meetinghouse-Universalist Church |
| Unitarian Church |
| United Baptist Church of Lakeport |
| United Church of Christ in Keene |
| Unity Town Hall |
| Upham-Walker House |
| US Post Office and Courthouse-Littleton Main |
| US Post Office-Dover Main |
| US Post Office-Laconia Main |
| US Post Office-Lancaster Main |
| US Post Office-Peterborough Main |
| US Post Office-Somersworth Main |
| USS ALBACORE |
| Valley Cemetery |
| Varney School |
| Veterans' Memorial Hall |
| Victory Park Historic District |
| Wakefield House |
| Wakefield Public Library |
| Wakefield Town Hall and Opera House |
| Wakefield Village Historic District |
| Wales, Mary Anne, House |
| Wallace Farm |
| Walpole Academy |
| Washington Common Historic District |
| Waterloo Covered Bridge |
| Waterloo Historic District |
| Watson Academy |
| Waumbek Cottages Historic District |
| Weare Town House |
| Webster Congregational Church |
| Webster Estate |
| Weeks Estate |
| Weeks House |
| Weeks, William Dennis, Memorial Library |
| Welcome Acres |
| Weldwood |
| Wentworth-Coolidge Mansion |
| Wentworth-Gardner and Tobias Lear Houses |
| Wentworth-Gardner House |
| Wentworth, Gov. John, House |
| Weston Observatory |
| Whidden-Ward House |
| Whipple, Dr. Solomon M., House |
| Whipple House |
| White Farm |
| White Meetinghouse |
| White Park |
| Whiting, Oliver, Homestead |
| Whittaker, Caleb, Place |
| Whittier Bridge |
| Wiggin, Cornet Thomas, House |
| Wiggin Memorial Library |
| Wilder-Holton House |
| Wildwood Cottage |
| Willard Homestead |
| Williamson House |
| Wilton Public and Gregg Free Library |
| Wilton Town Hall |
| Winchester Town Hall |
| Windermere |
| Windmill Hill |
| Windswept Acres-Powers House |
| Wolfeboro Centre Community Church |
| Woodbury Mill |
| Wood House |
| Woodman Institute |
| Woodman Road Historic District |
| Woodsville Opera Building |
| Wright's Bridge |
| Wyatt, Samuel, House |
| Wyman Tavern |
| Young, Gen. Mason J., House |
| Zimmerman House |
Data from United States Park Service and Wikidata
