New York - Criteria: C (architecture/engineering)
| Owasco Reformed Church |
| Owego Central Historic District |
| O & W Railroad Station at Port Ben |
| Oxford Village Historic District |
| Oyster Bay Long Island Rail Road Station |
| Oyster Bay Long Island Rail Road Turntable |
| Packard Motor Car Showroom and Storage Facility |
| Packer Farm and Barkersville Store |
| Paddock Arcade |
| Paddock Building |
| Paddock Mansion |
| PAD Factory, The |
| Page House |
| Pakatakan Artists Colony Historic District |
| Palace Theatre |
| Palatine Bridge Freight House |
| Palatine Church |
| Palatine German Frame House |
| Palen, Frank A., House |
| Palmer Brook Bridge |
| Palmer-Lewis Estate |
| Palmyra Village Historic District |
| Pangburn, Stephen, House |
| Pantigo Road Historic District |
| Parachute Jump |
| Paramount Theatre |
| Park Avenue and State Street Historic District |
| Park Avenue Historic District |
| Park Avenue Houses |
| Park Church |
| Parke Apartments |
| Park East Synagogue, Congregation Zichron Ephraim |
| Parker 13-Sided Barn |
| Parker, Alton B., Estate |
| Parker, Charles, House |
| Parker Farmhouse |
| Parker Training Academy Dutch Barn |
| Park Place Historic District |
| Park Plaza Apartments |
| Park Row Building |
| Parks-Bentley House |
| Parks, George H., House |
| Parkside Candy Shoppe and Factory |
| Parkside East Historic District |
| Parkside West Historic District |
| Park Slope Historic District |
| Park Square Historic District |
| Parkway Theatre |
| Parkway Village |
| Parmeter, Nathaniel, House |
| Parrott Hall |
| Parry House |
| Parry, John E., House |
| Parsonage Road Historic District |
| Parsonage, The |
| Parsons, Ambrose, House |
| Partridge Cottage |
| Pastures Historic District |
| Patchett House |
| Patriot's Park |
| Patroon Agent's House and Office |
| Patten, Jacob H., House |
| Patterson Farmhouse |
| "Patton, James ""Squire,"" House" |
| Pawling Hall |
| Payjack Chevrolet Building |
| Payne Cobblestone House |
| Payne, Col. Oliver Hazard, Estate |
| Payne, William A., House |
| Peabody, Royal C., Estate |
| Peachcroft |
| Pearl Street Schoolhouse |
| Pease, Daniel and Miriam, House |
| Peck, Henry M., House |
| Peck House |
| Peck, J. Franklin, House |
| Peck Memorial Library |
| Peck, Thomas, Farmhouse |
| Peck, Waltrous, House |
| Peekskill Downtown Historic District |
| Peekskill Freight Depot |
| Peekskill Presbyterian Church |
| Pelhamdale |
| Pelham Parkway Station (Dual System IRT) |
| Pelham Picture House |
| Pelton, Gideon, Farm |
| Pennsylvania Railroad Station |
| Penn Yan Historic District |
| Pentacostal Holy Temple Church of Jesus Christ |
| People's African Methodist Episcopal Zion Church |
| Peoples National Bank and Trust Company Building |
| Perrine's Bridge |
| Perry Downtown Historic District |
| Perry, Ezikial, House |
| Perry, Jacob P., House |
| Perry, Stuart and William Swezey Houses |
| Perry Village Hall |
| Peru Community Church |
| Peterboro Land Office |
| Peterboro Street Elementary School |
Data from United States Park Service and Wikidata
