New Hampshire - Area of significance: Architecture
| North Conway Depot and Railroad Yard |
| Northfield Union Church |
| North Hampton Library |
| North Hampton Town Hall |
| North Holderness Freewill Baptist Church-Holderness Historical Society Building |
| North Sandwich Meeting House |
| North School |
| North Weare Schoolhouse |
| North Wilmot Union Meetinghouse |
| Northwood Congregational Church |
| Noyes, George Washington, House |
| Noyes, Jacob, Block |
| Nutter-Rymes House |
| Old County Road South Historic District |
| Old Deerfield Center Historic District |
| Old Grafton County Courthouse |
| Old North Cemetery |
| Old Patch Place |
| Old Post Office |
| Old Post Office Block |
| Old Webster Meeting House |
| Orford Street Historic District |
| Owls Head |
| Page Belting Company Mills |
| Parker's Store |
| Park Hill Meetinghouse |
| Parsons Homestead |
| Parsons Studio and Casino |
| Peabody, William, House |
| Peck-Porter House |
| Pelham Library and Memorial Building |
| Pembroke Mill |
| Perry, Ivory, Homestead |
| Perry, John, Homestead |
| Perry, Norman and Marion, House |
| Peterborough Town House |
| Peterborough Unitarian Church |
| Pickering House |
| Pierce, Franklin, House |
| Pike House |
| Pillsbury Memorial Hall |
| Pinkham, Daniel, House |
| Piper, Rufus, Homestead |
| Piper, Solomon, Farm |
| Pittsfield Center Historic District |
| Plainfield Town Hall |
| Plaistow Carhouse |
| Pleasant View Home |
| Plumer-Jones Farm |
| Plummer Homestead |
| Plymouth Historic District |
| Point Comfort |
| Pointfield |
| Porter, General, House |
| Portsmouth Athenaeum |
| Portsmouth Cottage Hospital |
| Portsmouth Downtown Historic District |
| Portsmouth Harbor Light |
| Portsmouth Public Library |
| Potter Place Railroad Station |
| Pottersville District |
| Prescott, Benjamin Franklin, House |
| Protectworth Tavern |
| Public Market |
| Pulpit Rock Base-End Station (N. 142) |
| Pumpelly Studio |
| Purnell House |
| Raymond Boston and Maine Railroad Depot |
| Reade, Michael, House |
| Reed, Isaac, House |
| Religious Society of Friends Meetinghouse |
| Remick, Capt. Enoch, House |
| Richards, Dexter, & Sons Woolen Mill |
| Richards Free Library |
| Richardson, Abijah, Sr., Homestead |
| Richardson, John, Homestead |
| Richardson, Luke, House |
| Richmond Community Church |
| Richmond Town Hall |
| Robbe, James, Jr., House |
| Robie's Country Store |
| Rochester Commercial and Industrial District |
| Rockingham Hotel |
| Rocks Estate |
| Rockywold-Deephaven Camps |
| Rolfe Barn |
| Rollinsford Grade School |
| Rollinsford Town Hall |
| Rollins, Gov. Frank West, House |
| Rossiter, William, House |
| Rowe, Benjamin, House |
| Rundlet-May House |
| Russell-Colbath House |
| Rye Town Hall |
| Saint Anne Historic District |
| Sainte Marie Roman Catholic Church Parish Historic District |
| Saint-Gaudens National Historic Site Historic District |
| Salem Common Historic District |
| Salmon Falls Mill Historic District |
| Sanborn Seminary |
Data from United States Park Service and Wikidata
