Tennessee - Significance region: Local
| New Aetna Furnace Historic District (40HI149) |
| Newbern Illinois Central Depot |
| New Bethel Cumberland Presbyterian Church |
| Newburger, Joseph, House |
| Newman, Capt. James, House |
| New Market Presbyterian Church |
| New Salem Baptist Church |
| New Salem United Methodist Church |
| Newsom's Mill |
| New Southern Hotel |
| Newtown Historic District |
| Niota Depot |
| Noel Hotel |
| Nolan, James N., House |
| Nolensville School |
| Normal Station Historic District |
| Normandy Historic District |
| North Atlantic Street Historic District |
| Northcutt, H. B., House |
| Northcutt Plantation |
| Northcutts Cove Chapel |
| North Hills Historic District |
| Northington-Beach House |
| North Main Street Historic District |
| North Main Street Historic District |
| North Maney Avenue Historic District |
| North Poplar Historic District |
| Northside United Presbyterian |
| North Washington Historic District |
| North Washington Street Historic District |
| Northwood Avenue Historic District |
| Oak Grove Elementary School |
| Oak Grove Methodist Church |
| Oak Grove School |
| Oak Hall |
| Oakham |
| Oak Hill Farm |
| Oakland |
| Oakland Cemetery |
| Oakland Furnace and Forge (40HI146) |
| Oakland Presbyterian Church |
| Oaklawn Garden |
| Oakley |
| Oakslea Place |
| Oak Top |
| Obion County Courthouse |
| O'Bryan, George, House |
| Ochs Building |
| Ocoee Street Historic District |
| O'Dell House |
| Oden, Dr. Hezekiah, House |
| Officer Farmstead |
| Ogilvie, William, House |
| Ogle, Bud, Farm |
| Oglesby School |
| Old Aetna Furnace (40HI148) |
| Old College |
| Old Deery Inn |
| Old Fentress County Jail |
| Old Grainger County Jail |
| Old Gray Cemetery |
| Old Hickory Historic District |
| Old Hickory Methodist Church |
| Old Jail |
| Old Kingsport Presbyterian Church |
| Old Knoxville City Hall |
| Old Library Building |
| Old North Knoxville Historic District |
| Old Post House |
| Old Post Office |
| Old Post Office Building |
| Old Scott County Jail |
| Old Town |
| Old Town Bridge |
| Oliver Springs Banking Company |
| Olivet United Methodist Church, Parsonage and School |
| Omicron Sigma Chapter House of Sigma Gamma Rho Sorority, Incorporated |
| Omohundro Water Filtration Complex District |
| One Hundred North Main Building |
| Orpheum Theatre |
| Ossoli Circle Clubhouse |
| Ousley, Baite, House |
| Overbrook |
| Overton County Courthouse |
| Overton Lane |
| Overton Park Court Apartments |
| Overton Parkway Historic District |
| Owen Chapel Church of Christ |
| Owen, Charles, House |
| Owen-Cox House |
| Owen, Dr. Urban, House |
| Owen-Primm House |
| Paisley Hall |
| Palace Theater |
| Palmetto Farm |
| Paramount Theatre and Office Building |
| Pardue, James M., House |
| Paris Commercial Historic District |
| Park City Historic District |
| Park City Junior High School |
Data from United States Park Service and Wikidata
