Minot's Ledge Light (Plymouth County, Massachusetts)
Minott, William, House (Cumberland County, Maine)
Miramont (El Paso County, Colorado)
Mission Hill Triangle Historic District (Suffolk County, Massachusetts)
Mission of the Church of Our Savior (Rutland County, Vermont)
Mississippi State Capitol (Hinds County, Mississippi)
Missouri Pacifc Building (St. Louis, Missouri)
Mitchell Building (Milwaukee County, Wisconsin)
Mitchell House (Cumberland County, Maine)
Mitchell House (Cecil County, Maryland)
Mizpah Lodge Building (Ransom County, North Dakota)
Model School (Stearns County, Minnesota)
Monadnock Mills (Sullivan County, New Hampshire)
Mono County Courthouse (Mono County, California)
Monroe County Courthouse (Monroe County, Wisconsin)
Monroe Ward (Richmond, Virginia)
Monroe, Bessie, House (Essex County, Massachusetts)
Montana Avenue Historic District (El Paso County, Texas)
Montana Deaf and Dumb Asylum (Jefferson County, Montana)
Montana State Capitol Building (Lewis and Clark County, Montana)
Montana Territorial and State Prison (Powell County, Montana)
Montauk Avenue Historic District (New London County, Connecticut)
Monte Vista (Philadelphia County, Pennsylvania)
Monte Vista Hotel (Buncombe County, North Carolina)
Montello Commercial Historic District (Marquette County, Wisconsin)
Small city main street, that grew up around Montello's famous granite quarry
Montezuma Historic District (Macon County, Georgia)
Montgomery County Courthouse (Montgomery County, Georgia)
Montgomery House (New Castle County, Delaware)
Montgomery Ward Building (Mifflin County, Pennsylvania)
Monument Park Historic District (Worcester County, Massachusetts)
Monument Square Historic District (Worcester County, Massachusetts)
Monument Square Historic District (Belknap County, New Hampshire)
Monument Square Historic District (Charlestown) (Suffolk County, Massachusetts)
Monumental Methodist Church (Portsmouth, Virginia)
Moody Building (Bourbon County, Kansas)
Moody Mansion (Kennebec County, Maine)
Moody Street Fire Station (Middlesex County, Massachusetts)
Moore and Thompson Paper Mill Complex (Windham County, Vermont)
Moore, Jesse, House (Worcester County, Massachusetts)
Moore--Hill House (Essex County, Massachusetts)
Moores Creek National Battlefield (Pender County, North Carolina)
Moose River Congregational Church (Somerset County, Maine)
Moraine Park Museum and Amphitheater (Larimer County, Colorado)
Moratock Iron Furnace (Stokes County, North Carolina)
Morison, Capt. James, House (York County, Maine)
Mormon Church (Yavapai County, Arizona)
Morrill, Lot, House (Kennebec County, Maine)
Morrill--Lassonde House (Merrimack County, New Hampshire)
Morris Carnegie Library (Stevens County, Minnesota)
Morris Plan (Central Union Bank) (Vanderburgh County, Indiana)
Morris Silverman House (Lewis and Clark County, Montana)
Morris, Gen. Lewis R., House (Windsor County, Vermont)
Morrison County Courthouse (Morrison County, Minnesota)
Morse Bridge (Penobscot County, Maine)
On March 26, 1983 the Morse Covered Bridge in Bangor was destroyed by fire; there are no plans to rebuild it.
Morse, Amos, House (Norfolk County, Massachusetts)
Morse, Moses, House (Essex County, Massachusetts)
Mortland Family Farm (Waldo County, Maine)
Morven (Fauquier County, Virginia)
Moscow Methodist Church and Cemetery (Nevada County, Arkansas)
Moses Packard House (Plymouth County, Massachusetts)
Moses Webster House (Knox County, Maine)
Moses--Kent House (Rockingham County, New Hampshire)
Mosquito Island House (Knox County, Maine)
Mother Bethel A.M.E. Church (Philadelphia County, Pennsylvania)
Mount Airy Historic District (Surry County, North Carolina)
Mount Auburn Cemetery (Middlesex County, Massachusetts)
Mount Auburn Cemetery (Middlesex County, Massachusetts)
Mount Desert Light Station (Hancock County, Maine)
Mount Feake Cemetery (Middlesex County, Massachusetts)
Mount Greylock Summit Historic District (Berkshire County, Massachusetts)
Mount Holly Cotton Mill (Gaston County, North Carolina)
Mount Hope Bridge (Unspecified County, Rhode Island)
Suspension bridge over Mount Hope Bay on RI 114 in Bristol
Mount Hope Cemetery (Wake County, North Carolina)
Mount Hope Cemetery District (Penobscot County, Maine)
Mount Lowe Railway (Los Angeles County, California)
Mount Mora Cemetery (Buchanan County, Missouri)
Mount Pleasant Cemetery (Bristol County, Massachusetts)
Mount Pleasant Cemetery (Essex County, New Jersey)
Mount Pleasant Historic District (Suffolk County, Massachusetts)
Mount Royal Station (Baltimore, Maryland)
Mount Rushmore National Memorial (Pennington County, South Dakota)
Mount St. Peter Roman Catholic Church (Westmoreland County, Pennsylvania)
Mount Vernon Cemetery (Worcester County, Massachusetts)
Mount Vernon Square Historic District (Washington, District of Columbia)
Mount Washington Hotel (Coos County, New Hampshire)
Mountain Shoals Plantation (Spartanburg County, South Carolina)
Historic home in Enoree, SC
Mountain View Hotel (Albany County, Wyoming)
Mountainside Lodge (Larimer County, Colorado)
Mowers' Block (Essex County, Massachusetts)
Mowry, Tyler, House (Providence County, Rhode Island)
Mowry, William, House (Providence County, Rhode Island)
Moyle House and Indian Tower (Utah County, Utah)
MP Tuxedo Park Station (St. Louis County, Missouri)
Preserved Missouri Pacific Railroad station
Mrs. Lydia McCaffery's Furnished Rooms (Missoula County, Montana)
Mukwonago High School (Waukesha County, Wisconsin)
Former high school building, demolished after school moved to a new building
Mulford Building (Philadelphia County, Pennsylvania)
Mullins Court (Miller County, Arkansas)
Multnomah County Courthouse (Multnomah County, Oregon)
Municipal Building (New York County, New York)
Municipal Building (Hartford County, Connecticut)
Municipal Building (Oxford County, Maine)
Municipal Golf Course (Buncombe County, North Carolina)
Munson Building (Buchanan County, Iowa)
Murch Family House (Knox County, Maine)
Murdock School (Worcester County, Massachusetts)
Murray County High School Historic District (Murray County, Georgia)
Rock walled school building
Murray Hill Summer Home District (Merrimack County, New Hampshire)
Musgrove Block (Essex County, Massachusetts)
Music Hall (Westchester County, New York)
Musketaquid Mills (Middlesex County, Massachusetts)
Mystic Dam (Middlesex County, Massachusetts)
Mystic Gatehouse (Middlesex County, Massachusetts)
Mystic Water Works (Middlesex County, Massachusetts)
Naaman's Creek School (New Castle County, Delaware)
Nahant Civic Historic District (Essex County, Massachusetts)
Napa County Courthouse Plaza (Napa County, California)
Narragansett Pier Life Saving Station (Washington County, Rhode Island)
Nashua Manufacturing Company Historic District (Hillsborough County, New Hampshire)
Nashville Historic District (Hillsborough County, New Hampshire)
Nashville National Cemetery (Davidson County, Tennessee)
A National Cemetery from the Civil War Era, as current now as then
Nathan G. Hichborn House (Waldo County, Maine)
National Archives (Washington, District of Columbia)
National Bank of Commerce Building (Jackson County, Missouri)
National Bank of Tacoma (Pierce County, Washington)
National Bank of Washington, Washington Branch (Washington, District of Columbia)
National City Bank (New York County, New York)
National Clothespin Factory (Washington County, Vermont)
National Humane Alliance Animal Fountain (Bernalillo County, New Mexico)
National Mall (Washington, District of Columbia)
National Portrait Gallery (Washington, District of Columbia)
National State Bank (Camden County, New Jersey)
National Theater (Richmond, Virginia)
National Valley Bank (Staunton, Virginia)
National War College (Washington, District of Columbia)
Naugatuck Center Historic District (New Haven County, Connecticut)
Naval Hospital Boston Historic District (Suffolk County, Massachusetts)
Navarro County Courthouse (Navarro County, Texas)
Nebraska State Capitol (Lancaster County, Nebraska)
Needham Town Hall Historic District (Norfolk County, Massachusetts)
Nehemiah P. Clarke House (Stearns County, Minnesota)
Nelson Family Farm (Androscoggin County, Maine)
Nelson Schoolhouse (Cheshire County, New Hampshire)
Nelson's Grocery (Richland County, North Dakota)
Neuweiler Brewery (Lehigh County, Pennsylvania)
Nevada Brewery (Nevada County, California)
New Bedford Gas and Edison Light Complex (Bristol County, Massachusetts)
New Bern Municipal Building (Craven County, North Carolina)
New Boston Inn (Berkshire County, Massachusetts)
New Brunswick Station (Middlesex County, New Jersey)
New Castle Ice Piers (New Castle County, Delaware)
New Durham Meetinghouse and Pound (Strafford County, New Hampshire)
New Durham Town Hall (Strafford County, New Hampshire)
New England Building (Cuyahoga County, Ohio)
New England Conservatory of Music (Suffolk County, Massachusetts)
New Hampshire Savings Bank Building (Merrimack County, New Hampshire)
New Hampshire State Union Armory (Hillsborough County, New Hampshire)
New Hampton Community Church (Belknap County, New Hampshire)
New Haven County Courthouse (New Haven County, Connecticut)
New Haven Green Historic District (New Haven County, Connecticut)
New Ipswich Town Hall (Hillsborough County, New Hampshire)
New London Customhouse (New London County, Connecticut)
New London Ledge Lighthouse (New London County, Connecticut)
New London Public Library (New London County, Connecticut)
New Main--Augsburg Seminary (Hennepin County, Minnesota)
New Mexico Madonna of the Trail (Bernalillo County, New Mexico)
New Mount Sinai Cemetery (St. Louis County, Missouri)
New Portland Wire Bridge (Somerset County, Maine)
Suspension bridge over Carrabasset River on Wire Bridge Road in New Portland
New Pump-House (Richmond, Virginia)
New Salem Common Historic District (Franklin County, Massachusetts)
New Scotland Avenue (Troop B) Armory (Albany County, New York)
New Sharon Congregational Church (Franklin County, Maine)
New Ulm Post Office (Brown County, Minnesota)
New York Central Terminal (Erie County, New York)
New York Evening Post Building (New York County, New York)
New York Life Building (New York County, New York)
New York Mutual Life Insurance Company Building (Philadelphia County, Pennsylvania)
New York Presbyterian Church (New York County, New York)
New York Savings Bank (New York County, New York)
New York State Armory (Orange County, New York)
New York State Capitol (Albany County, New York)
Newark City Hall (Essex County, New Jersey)
Newark Passenger Station (New Castle County, Delaware)
Newberry Friends Meeting House (Orange County, Indiana)
Newbury Village Historic District (Orange County, Vermont)
Newburyport Historic District (Essex County, Massachusetts)