Georgia - Area of significance: Architecture
| Oakland City Historic District |
| Ochlocknee Missionary Baptist Church and Cemetery |
| Ocilla Public School |
| Ocmulgee National Monument |
| Oconee Hill Cemetery |
| Oconee Street School |
| Octagon House |
| Odd Fellows Building and Auditorium |
| O'Flaherty, John, House |
| Oglethorpe Avenue Historic District |
| Oglethorpe University Historic District |
| Old Bartow County Courthouse |
| Old Brick Mill |
| Old Chattahoochee County Courthouse |
| Old Clinton Historic District |
| Old Dawson Place |
| Old DeKalb County Courthouse |
| Old Gaissert Homeplace |
| Old Governor's Mansion |
| Old Jail |
| Old Macon Library |
| Old Marion County Courthouse |
| Old Medical College Building |
| Old Medical College Historical Area |
| Old North Campus, University of Georgia |
| Old Richmond County Courthouse |
| Old Rock House |
| Old Seminary Building |
| Old State Capitol |
| Old St. Teresa's Catholic Church |
| Old Union County Courthouse |
| Old U.S. Post Office and Federal Building |
| Old White County Courthouse |
| Olgetree Farm |
| Olliff, William W., Farm |
| Omega Chapter of the Chi Phi Fraternity |
| Omer Christian Church and Cemetery |
| O'Neal School Neighborhood Historic District |
| Orange Hall |
| Orna Villa |
| Orr, J. K., Shoe Company |
| Ossabaw Island |
| Owens, Hubert Bond, House |
| Owens-Thomas House |
| Oxford Historic District |
| Pace House |
| Pace, Solomon and Penelopy, House |
| Paine College Historic District |
| Palmer House and Phelan House Apartments |
| Paoli Historic District |
| Paradise Gardens |
| Paradise Park Historic District |
| Parker, Aaron and Margaret, Jr., House |
| Park Front |
| Park Street Methodist Episcopal Church, South |
| Parr, Calvin W., House |
| Parrott Historic District |
| Parrott Insurance Building |
| Pasaquan |
| Patterson-Turner Homeplace |
| Paulding County Courthouse |
| Peabody School |
| Peacewood |
| Peach County Courthouse |
| Peachtree Center Historic District |
| Peachtree Christian Church |
| Peachtree Heights Park |
| Peachtree Highlands Historic District |
| Peachtree Highlands-Peachtree Park Historic District |
| Peachtree Southern Railway Station |
| Peacock Woods-Dimon Circle Historic District |
| Pearce, William and Minnie, House |
| Pearson-Boyer Plantation |
| Pebble Hill Plantation |
| Pelham Commercial Historic District |
| Pembroke Historic District |
| Penfield Historic District |
| Penn Place |
| Peters, Edward C., House |
| Peterson-Wilbanks House |
| Pharr-Callaway-Sethness House |
| Phillips, George, House |
| Phillips-Sims House |
| Phillips-Turner-Kelly House |
| Phillips, William D., Log Cabin |
| Philomath Historic District |
| Phoenix Hotel |
| Pickens County Courthouse |
| Pickens County Jail |
| Piedmont Park Apartments |
| Pierce County Courthouse |
| Pierce County Jail |
| Pigtail Alley Historic District |
| Pike County Courthouse |
| Pinched Gut Historic District |
| Pine Bloom Plantation |
| Pine Gardens Historic District |
| Pine Log Methodist Church, Campground, and Cemetery |
| Pine Mountain State Park |
| Pines, The |
Data from United States Park Service and Wikidata
