Rhode Island - Area of significance: Architecture
| Jenckes Mansion |
| Jenckes Spinning Company |
| Jenks Park & Cogswell Tower |
| Jennys Lane Historic District |
| Jillson, Luke, House |
| Jones Warehouses |
| Joseph, Lyman C., House |
| Joy Homestead |
| Jules Desurmont Worsted Company Mill |
| Kay Street-Catherine Street-Old Beach Road Historic District |
| Kent County Courthouse |
| Kenyon's Department Store |
| King, Edward, House |
| Kingscote |
| Kingston Hill Farm |
| Kingston Railroad Station |
| Kingston Village Historic District |
| Knight Estate |
| Knightsville Meetinghouse |
| Kotzow, Louis, House |
| Ladd Observatory |
| Lafayette Village |
| Lafayette Worsted Company Administrative Headquarters Historic District |
| Lawton-Almy-Hall Farm |
| L'Eglise du Precieux Sang |
| Leroy Theatre |
| Lewis-Card-Perry House |
| Lillibridge, Simon, Farm |
| Limerock Village Historic District |
| Linton Block |
| Lippitt, Gov. Henry, House |
| Lippitt Hill Historic District |
| Lippitt Mill |
| Little Compton Common Historic District |
| Loew's State Theatre |
| Logee House |
| Longfield |
| Lonsdale Historic District |
| Louttit Laundry |
| Lucas-Johnston House |
| L'Union Saint Jean-Baptist d' Amerique |
| Lymansville Company Mill |
| Main Street Historic District |
| Main Street Historic District |
| Malbone |
| Malbone, Francis, House |
| Manton-Hunt-Farnum Farm |
| Manville Company Worker Housing Historic District |
| Marble House |
| Marchant, Henry, Farm |
| Market House |
| Mason, Israel B., House |
| Mathewson Farm |
| Mawdsley, Capt. John, House |
| Merchants Bank Building |
| Metcalf-Franklin Farm |
| Miantonomi Memorial Park |
| Miller, William Davis, House |
| Mitchell-Arnold House |
| Modern Diner |
| Montgomery, Nathaniel, House |
| Moosup Valley Historic District |
| Moshassuck Square |
| Mount Hope Farm |
| Mount Vernon Tavern |
| Mowry, Tyler, House |
| Mowry, William, House |
| Mt. Hygeia |
| Murphy, Dennis J., House at Ogden Farm |
| Narragansett Baptist Church |
| Narragansett Pier Life Saving Station |
| National and Providence Worsted Mills |
| Naushon Company Plant |
| Nayatt Point Lighthouse |
| New England Butt Company |
| Newman Congregational Church |
| Newport Artillery Company Armory |
| Newport Casino |
| Newport Harbor Lighthouse |
| Newport Historic District |
| Newport Steam Factory |
| Nicholson File Company Mill Complex |
| Nightingale-Brown House |
| North End Historic District |
| Northrup, Stephen, House |
| Norwood Avenue Historic District |
| Oak Glen |
| Oakland Avenue Historic District |
| Oakland Historic District |
| Oak Lawn Village Historic District |
| Ocean Drive Historic District |
| Ocean Road Historic District |
| Ochre Point-Cliffs Historic District |
| Oddfellow's Hall |
| Old Ashton Historic District |
| Old Colony House |
| Old Congregational Church |
| Old Harbor Historic District |
| Old Narragansett Church |
| Olney, Capt. Stephen, House |
Data from United States Park Service and Wikidata
