Massachusetts - Area of significance: Commerce
| Harvard Avenue Historic District |
| Harvard Shaker Village Historic District |
| Haverhill Board of Trade Building |
| Hayes, Charles H., Building |
| Haynes Hotel Waters Building |
| Henking Hotel and Cafe |
| Hickey-Osborne Block |
| Higgins-Hodgeman House |
| Highland House |
| Highlands Historic District |
| Hillside Cemetery |
| "Hooper, Robert ""King"", Mansion" |
| Hoosac Stores 1 & 2-Hoosac Stores 3 |
| Hoosac Tunnel |
| Hotel Waverly |
| House at 11 Beach Street |
| House at 170 Otis Street |
| House at 199 Summer Avenue |
| House at 206 West Street |
| House at 21 Dartmouth Street |
| House at 57 Woburn Street |
| House at 9 Linden Street |
| Howard Block |
| Howard, Frank, Building |
| Howe Building |
| Hoyt-Shedd Estate |
| Huntington Village Historic District |
| Irving Square Historic District |
| Jack's Diner |
| Jackson Homestead |
| Jenckes, E. N., Store |
| JOFFRE, (shipwreck) |
| Jones Block |
| Jones Tavern |
| Kennedy-Worthington Blocks |
| Kimball, C. Henry, House |
| King Caesar House |
| LAMARTINE (shipwreck) |
| Larrabee's Brick Block |
| Leather District |
| Lee Lower Main Street Historic District |
| Lenox Village Historic District |
| Leonard School |
| Lewis, Deacon Willard, House |
| Lincoln Historic District |
| Locke, Lt. Benjamin, Store |
| Locke-Ober Restaurant |
| Longmeadow Historic District |
| Long Wharf and Custom House Block |
| Lothrop, Caleb, House |
| Lothrop, H.B., Store |
| Lothrop, Joseph, House |
| LUNA (tugboat) |
| Luther Store |
| Lyman Block |
| Lynn Bank Block |
| Machine Shop Village District |
| Mahaiwe Block |
| Main and Franklin Streets Historic District |
| Main Street Historic District |
| Main Street Historic District |
| Main Street-Locke |
| Manomet Mills |
| Marblehead Historic District |
| Market Square Historic District |
| Marlborough Center Historic District |
| Masonic Block |
| Mason, William P., House |
| McKinney Building |
| Mechanics Block Historic District |
| Mechanics' Hall District |
| Medway Village Historic District |
| Memorial Square District |
| Merrill's Wharf Historic District |
| Merrimack Associates Building |
| Merrimack-Middle Streets Historic District |
| Middleborough Center Historic District |
| Middlesex Canal |
| Middlesex Canal Historic and Archeological District |
| Millers Falls Village Historic District |
| Mill Village Historic District |
| Miss Florence Diner |
| Mission Hill Triangle Historic District |
| Miss Toy Town Diner |
| Miss Worcester Diner |
| Monarch Diner |
| Monson Center Historic District |
| Montague Center Historic District |
| Monument Mills |
| Monument Square-Eagle Street Historic District |
| Monument Square Historic District |
| Moody Street Historic District |
| Moore State Park Historic District |
| Morgan Block |
| Munroe Street Historic District |
| Nantucket Historic District |
| Natick Center Historic District |
| New Bay Diner Restaurant |
| New Bedford Historic District |
| New Boston Inn |
Data from United States Park Service and Wikidata
