Arkansas - Criteria: C (architecture/engineering)
| Old US 71-Jenny Lind Segment |
| Old US 71-Little River Approach |
| Old US 71-Ogden Segment |
| Old US 71-Wilton Segement |
| Oliver House |
| Olmstead, T. E., & Son Funeral Home |
| O'Neal, Howard, Barn |
| Opal's Steak House |
| Orange Street Presbyterian Church |
| Osage Mills Dam |
| Ouachita County Courthouse |
| Ouachita River Lock and Dam No. 8 |
| Our Lady of Perpetual Help Church |
| Owens, Silas, Sr., House |
| Owings House |
| Ozark Courthouse Square Historic District |
| Ozmer House |
| Pangburn, Austin, House |
| Paragould Downtown Commercial Historic District |
| Paragould War Memorial |
| Paris Commercial Historic District |
| Parkdale Baptist Church-AS0051 |
| Parkdale Methodist Church |
| Parker-Hickman Farm Historic District |
| Parker House |
| Park Hill |
| Park Hill Fire Station and Water Company Complex |
| Park Hill Historic District |
| Park Hotel |
| Parks-Reagan House |
| Parks School |
| Parkview Apartments |
| Parkway Courts Historic District |
| Parnell Hall |
| Parnell-Sharpe House |
| Paschall House |
| Passmore, Charley, House |
| Passmore House |
| Patman House |
| Patrick, Dr. James. House |
| Patterson, Walter, Filling Station |
| Patterson, Walter, House |
| Patton House |
| Pea Ridge Commercial Historic District |
| Pea Ridge School Building |
| Pearson-Robinson House |
| Peel, Col. Samuel W., House |
| Pence-Carmichael Farm, Barn and Root Cellar |
| Pennington House |
| Peoples Bank and Loan Building |
| Peoples Building & Loan Building |
| "Pernot, Henry ""Harry"" Charles, House" |
| Perry County Courthouse |
| Perry Plaza Court Historic District |
| Perry Street Historic District |
| Perryville American Legion Building |
| Petit Jean River Bridge |
| Petit Jean State Park-Lake Bailey-Roosevelt Lake Historic District |
| Petit Jean State Park-Mather Lodge |
| Pettigrew School |
| Pfeifer Brothers Department Store |
| Pfeiffer House |
| Pharr Cabin |
| Philadelphia Methodist Church |
| Philander Smith College Historic District |
| Phillips County Courthouse |
| Phillips County Penal Farm Historic District |
| Physical Education Building-Arkansas Tech University |
| Piercy Farmstead |
| Piggott Commercial Historic District |
| Piggott National Guard Armory |
| Pike, Albert, Hotel |
| Pike County Courthouse |
| Pike-Fletcher-Terry House |
| Pillow, Jerome Bonaparte, House |
| Pindall, Xenophon Overton, Law Office |
| Pine Bluff Civic Center |
| Pine Bluff Commercial Historic District |
| Pine Bluff Fifth Avenue Historic District |
| Pine Ridge School Building |
| Pinkston-Mays Store Building |
| Pioneer House |
| Planters Bank Building |
| Plaza Apartments |
| Pleasant Hill Methodist Church |
| Pleasant Street Historic District |
| Plummer House |
| Plummer, John A., House |
| Pocahontas Commercial Historic District |
| Pocahontas Post Office |
| Poinsett Community Club |
| Poinsett County Courthouse |
| Polk County Courthouse |
| Porter, Lamar, Athletic Field |
| Portia School |
| Portland United Methodist Church |
| Pottsville Citizen's Bank |
| Pottsville Commercial Historic District |
| Powell, Benjamin T., House |
| Powell Clothing Store |
Data from United States Park Service and Wikidata
