Arkansas - Significance region: Local
| Mulberry River Bridge |
| Mullins Court |
| Munger House |
| Munger, Raymond, Memorial Chapel-University of the Ozarks |
| Municipal Building |
| Murfreesboro Cities Service Station |
| Murphy, Charles H., Sr., House |
| Murphy-Hill Historic District |
| Murphy, William J., House |
| Mutual Aid Union Building |
| Muxen Building |
| Myers House |
| Naff House |
| Nash-Reid-Hill House |
| Nashville American Legion Building |
| Nashville Commercial Historic District |
| National Bank of Commerce Building |
| National Guard Armory |
| National Guard Armory |
| National Guard Armory-Pine Bluff |
| National Old Line Insurance Company Building |
| Neaville, J. A., House |
| Neif, Charles J., House |
| Nelson House |
| Nevada County Courthouse |
| Newbill-Porter House |
| New Blaine School |
| New Edinburg Commercial Historic District |
| New Home School Building |
| New Hope Missionary Baptist Church Cemetery, Historic Section |
| New Hope School |
| New Liberty School |
| New Mt. Pisgah School |
| Newport American Legion Community Hut |
| New Rocky Comfort Jail |
| New South Inn |
| New Theatre |
| Newton County Courthouse |
| Newton County Jail |
| Newton Sutterfield Farmstead |
| New Zion AME Zion Church |
| Nichol House |
| Nimmo Clubhouse |
| Nix Creek Bridge |
| No. 12 School |
| Noricks Chapel School |
| Norman Town Square |
| Norristown Cemetery |
| North Elm Street Historic District |
| Northern Ohio School |
| North Garvin Drive Historic District |
| North Jackson Street Bridge |
| North Little Rock City Hall |
| North Little Rock High School |
| North Mock Street Historic District |
| North Washington Street Bridge |
| North Washington Street Historic District |
| Norwood, William H., House |
| Nutt-Trussell Building |
| Oak Cemetery |
| Oak Forest United Methodist Church |
| Oak Grove Cemetery |
| Oak Grove Cemetery Historic Section |
| Oak Grove Missionary Baptist Church |
| Oak Grove Rosenwald School |
| Oak Grove School |
| Oak Hill Mausoleum |
| Oak Hill School House |
| Oakland |
| Oakland Cemetery |
| Oakland Farm |
| Oark School-Methodist Church |
| O'Bryant, W.E., Bell Tower |
| Ogan, Servetus W., House |
| O'Kane-Jacobs House |
| Okolona Colored High School Gymnasium |
| Old Arkansas 22-Dardanelle Segment |
| Old Arkansas 2-Mayton Segment |
| Old Bell Telephone Building |
| Old Benton-Sardis Road Bridge |
| Old Central Fire Station |
| Old Corinth Cemetery |
| Old Highway 16 Bridge |
| Old Huntington Jail |
| Old Piney Cemetery |
| Old Post Office |
| Old Post Office |
| Old Post Office |
| Old Post Office Building and Customhouse |
| Old Randolph County Courthouse |
| Old River Bridge |
| Old School Presbyterian Church |
| Old Searcy County Jail |
| Old Springdale High School |
| Old Town Historic District |
| Old Union School |
| Old U.S. 62, Busch Segment |
| Old U.S. 64-Van Buren Segment |
| Old US 67, Alicia to Hoxie |
| Old US 71-Ashdown Segment |
Data from United States Park Service and Wikidata
