Built during 1890s

Mitchell House (Yell County, Arkansas)
Mitchell--Estes Farmstead (Edmonson County, Kentucky)
Mitchell--Ward House (Benton County, Arkansas)
Mitchell-Tappan House (St. Louis County, Minnesota)
Mitchelltown Historic District (Lenoir County, North Carolina)
Moab Cabin (Grand County, Utah)
Modern Tool Company (Erie County, Pennsylvania)
Modern Woodmen of America Hall (Brown County, South Dakota)
Moeszinger--Marquis Hardware Co. (Clinton County, Iowa)
Hardware vendor repurposed as an office building
Moir Building (Santa Clara County, California)
Mollohan Mill (Webster County, West Virginia)
Monadnock Block (Cook County, Illinois)
Monarch-Payne House (Daviess County, Kentucky)
Monastery of Our Lady of Charity (Bexar County, Texas)
Monday House (Knox County, Tennessee)
Monmouth Boat Club (Monmouth County, New Jersey)
Monon Park Dancing Pavillion (Lake County, Indiana)
Monona County Courthouse (Monona County, Iowa)
Monona Township Culvert (Clayton County, Iowa)
Monroe County Courthouse (Monroe County, Georgia)
Monroe County Courthouse (Monroe County, Wisconsin)
Monroe County Courthouse (Monroe County, Tennessee)
Monroe School (Erie County, Ohio)
Monroe Wilson House (Fairfield County, South Carolina)
Historic home in Ridgeway, SC
Montana Deaf and Dumb Asylum (Jefferson County, Montana)
Montana State Capitol Building (Lewis and Clark County, Montana)
Montana State Normal School (Beaverhead County, Montana)
Monte Ne (Benton County, Arkansas)
Monte Vista Library (Rio Grande County, Colorado)
Monterey Place (Mobile County, Alabama)
Montezuma Depot (Macon County, Georgia)
Montezuma Fuller House (Larimer County, Colorado)
Montgomery County Courthouse (Montgomery County, Iowa)
Montgomery County Jail (Montgomery County, Iowa)
Montgomery Hall, Colorado College (El Paso County, Colorado)
Montgomery Opera House (Clark County, Missouri)
Montgomery Union Station and Trainshed (Montgomery County, Alabama)
Montgomery Water Works Building (Orange County, New York)
Montpelier Odd Fellows Hall (Bear Lake County, Idaho)
Montrose, The (Middlesex County, Massachusetts)
Montvale Block (Spokane County, Washington)
Montview Boulevard (Denver County, Colorado)
Moody Mansion (Kennebec County, Maine)
Moody Street Fire Station (Middlesex County, Massachusetts)
Moonlight Towers (Travis County, Texas)
Moore House (Mississippi County, Missouri)
Moore, Jesse, House (Worcester County, Massachusetts)
Moore, William H., House (New York County, New York)
Moore--Dalton House (Butler County, Missouri)
Moore-Cunningham House (Ada County, Idaho)
Moore-Lindsay House (Cleveland County, Oklahoma)
Moore-Settle House (Garvin County, Oklahoma)
Moose River Congregational Church (Somerset County, Maine)
Moreland (Montgomery County, Maryland)
Moreland House (Mercer County, Kentucky)
Moreland Terrace Historic District (Bristol County, Massachusetts)
Morey House (Bell County, Texas)
Morey-Lampert House (St. Joseph County, Indiana)
Morgan Bridge (Madison County, Iowa)
Morgan House (Pickens County, South Carolina)
Historic home in Central, SC, now serving as a museum
Morgan House (Monroe County, Indiana)
Morgan's Point Historic District (Harris County, Texas)
Morgan--Case Homestead (Granite County, Montana)
Moriarty Eclipse Windmill (Torrance County, New Mexico)
Morin House (Yavapai County, Arizona)
Moritz Bergstein Shoddy Mill and Warehouse (Washington County, Minnesota)
Moroni Opera House (Sanpete County, Utah)
Morrill Hall (Story County, Iowa)
Morris Avenue Historic District (Jefferson County, Alabama)
Morris Ranch Schoolhouse (Gillespie County, Texas)
Morris Roberts Store (Gooding County, Idaho)
Morris Silverman House (Lewis and Clark County, Montana)
Morris Sommer House (Washington County, Idaho)
Morrison County Courthouse (Morrison County, Minnesota)
Morristown College Historic District (Hamblen County, Tennessee)
Morristown School (Morris County, New Jersey)
Morristown Store (Maricopa County, Arizona)
Morrow and Sinnige Nabers Building (Jefferson County, Alabama)
Morse & Co. Office Building (Penobscot County, Maine)
Morse and Wade Building (Yadkin County, North Carolina)
Morton-James Public Library (Otoe County, Nebraska)
Moses Packard House (Plymouth County, Massachusetts)
Moses Parrott House (Douglas County, Oregon)
Moses Rodgers House (San Joaquin County, California)
Mosman House (Larimer County, Colorado)
Moss Ledge (Franklin County, New York)
Mossman, Col. Adelbert, House (Middlesex County, Massachusetts)
Mote--Morris House (Lake County, Florida)
Mother of Sorrows Church (Ashtabula County, Ohio)
Mount Adams Public School (Hamilton County, Ohio)
Mount Calvary Baptist Church (Orange County, Virginia)
Mount Horeb Baptist Church (Montgomery County, Missouri)
Mount Lowe Railway (Los Angeles County, California)
Mount Pleasant Methodist Church (Scott County, Arkansas)
Mount Pleasant School (St. Louis, Missouri)
Mount Royal Station (Baltimore, Maryland)
Mount St. Gertrude Academy (Boulder County, Colorado)
Mount Vernon Commercial District (Rockcastle County, Kentucky)
Mount Zion A.M.E. Church (Marion County, Florida)
Mount Zion Baptist Church (Calhoun County, Alabama)
Mountain Avenue Station (Essex County, New Jersey)
Mountain Iron Mine (St. Louis County, Minnesota)
Mountz House (De Kalb County, Indiana)
Mowers' Block (Essex County, Massachusetts)
Mrs. B. F. Williamson House (Darlington County, South Carolina)
Mrs. Lydia Johnson House (Jackson County, Iowa)
Mrs. M. P. Sargent House (Mohave County, Arizona)
Mrs. Preston B. Plumb House (Lyon County, Kansas)
Mt. Carmel School and Church (Kane County, Utah)
Mt. Horeb Opera Block (Dane County, Wisconsin)
Mt. Olive Methodist Episcopal Church (Loudoun County, Virginia)
Mt. Pleasant Methodist Church (Lowndes County, Mississippi)
Mt. Pleasant School (Berkeley County, West Virginia)
Mt. Tabor Good Samaritan Lodge #59 (Anne Arundel County, Maryland)
Mt. Tabor Methodist Episcopal Church (Anne Arundel County, Maryland)
Mt. Vernon Methodist Church (Scott County, Virginia)
Mt. Zion Church and Cemetery (Henry County, Tennessee)
Muheim House (Cochise County, Arizona)
Mule Barn Theatre (Atchison County, Missouri)
Mulford T. Hunter House (Wayne County, Michigan)
Mulhall United Methodist Church (Logan County, Oklahoma)
Mullendore House (Pike County, Mississippi)
Munger Terrace (St. Louis County, Minnesota)
Munroe, Horace, House (Androscoggin County, Maine)
Munroe, Sarah, Three-Decker (Worcester County, Massachusetts)
Munson Building (Buchanan County, Iowa)
Murray Downtown Historic District (Salt Lake County, Utah)
Murray Hill Station (Union County, New Jersey)
Musgrove Block (Essex County, Massachusetts)
Music Hall (Hunterdon County, New Jersey)
Myler House (Benton County, Arkansas)
Myles Standish Monument (Plymouth County, Massachusetts)
Mylius--Eaton House (Woodbury County, Iowa)
Myrene Apartment Building (Washington, District of Columbia)
Mystic Theater (Licking County, Ohio)
N. S. Nielson House (Sanpete County, Utah)
Nahant Civic Historic District (Essex County, Massachusetts)
Nando Felty Saloon (Boyd County, Kentucky)
Napoleon Bonaparte McCanless House (Rowan County, North Carolina)
Napoleon Rice House (Douglas County, Oregon)
Narciso Valdez House (Mora County, New Mexico)
Nashville Union Station and Trainshed (Davidson County, Tennessee)
Nathan C. Ricker House (Champaign County, Illinois)
Nathan Loeb House (Multnomah County, Oregon)
Nathaniel Curry House (Douglas County, Oregon)
Nathaniel H. Burt House (Leavenworth County, Kansas)
Nathaniel J. Williams House (Summit County, Utah)
Nathaniel West Buildings (Multnomah County, Oregon)
National Cathedral (Washington, District of Columbia)
National City Bank (New York County, New York)
National Foundry and Machine Company (Jefferson County, Kentucky)
National Musical String Company (Middlesex County, New Jersey)
National Park Seminary Historic District (Montgomery County, Maryland)
National Tobacco Work Branch Stemmery (Jefferson County, Kentucky)
National Tobacco Works Branch Drying House (Jefferson County, Kentucky)
National Tobacco Works Warehouse (Jefferson County, Kentucky)
National Transit Building (Venango County, Pennsylvania)
National Union Building (Washington, District of Columbia)
Natoma Presbyterian Church (Osborne County, Kansas)
Natural History Building (Champaign County, Illinois)
Naugatuck Center Historic District (New Haven County, Connecticut)
Naulakha (Windham County, Vermont)
Navajo County Courthouse (Navajo County, Arizona)
Nazareth Convent and Academy (Cloud County, Kansas)
Nazareth House (Monroe County, New York)
Neblett Place Farm (Dickson County, Tennessee)
Nebraska Telephone Company Building (Lancaster County, Nebraska)
Neely House (Morgan County, Indiana)
Nehemiah P. Clarke House (Stearns County, Minnesota)
Nehs Flour Mill (Waukesha County, Wisconsin)
Neill-Mauran House (Philadelphia County, Pennsylvania)
Neilson House (Alachua County, Florida)
Nellie and Thomas Knotts House (Polk County, Iowa)
Nellie Johnstone No. 1 (Washington County, Oklahoma)
Nels A. Holmes Farmstead (Iron County, Michigan)
Nels A. Nelson House (Salt Lake County, Utah)
Nels and Minnie Jenson House (Box Elder County, Utah)
Nelson County Courthouse (Nelson County, Kentucky)
Nelson School (Washington County, Minnesota)
Nelson Tenement (Jackson County, Mississippi)
Nemaha County Courthouse (Nemaha County, Nebraska)
Nephi and Annie Kindred House (Utah County, Utah)
Ness County Bank (Ness County, Kansas)
Nestor P. Eaton House (Socorro County, New Mexico)
Netcott--Pfeiffer House (Butler County, Iowa)
Netherwood Station (Union County, New Jersey)