Built during 1890s

Lewiston Trust and Safe Deposit Company (Androscoggin County, Maine)
Lewthwaite--Moffatt House (Clackamas County, Oregon)
Libby, Nelson F., House (Middlesex County, Massachusetts)
Liberty Arming the Patriot (Providence County, Rhode Island)
Liberty County Jail (Liberty County, Georgia)
Liberty Hill Schoolhouse (Alachua County, Florida)
Liberty School No. 4, Friendship Building (Allegheny County, Pennsylvania)
Library Hall (Kane County, Illinois)
Library of Congress, Thomas Jefferson Building (Washington, District of Columbia)
Library Park (Kenosha County, Wisconsin)
Library Park (Dane County, Wisconsin)
Liddell-McNinch House (Mecklenburg County, North Carolina)
Lido Theater (Skagit County, Washington)
Lieblein House (Houghton County, Michigan)
Life Building (New York County, New York)
Lightkeeper's House (Cook County, Minnesota)
LimeRock Inn (Knox County, Maine)
Lincoln County Courthouse (Lincoln County, Kansas)
Lincoln County Courthouse (Lincoln County, Washington)
Colonial Revival/Richardsonian Romanesque courthouse built in 1897
Lincoln House Club (Barnstable County, Massachusetts)
Lincoln Park Residential Historic District (Blue Earth County, Minnesota)
Lincoln School (Rock Island County, Illinois)
Lincoln School (McCracken County, Kentucky)
Lincoln School (Racine County, Wisconsin)
Old school repurposed as living quarters.
Lincoln Trust Building (St. Louis, Missouri)
Lincolnshire, The (Essex County, Massachusetts)
Lindauer and Rupert Block (Outagamie County, Wisconsin)
Downtown Kaukauna Retail Commercial Building
Linden Street Bridge (Middlesex County, Massachusetts)
Lindsley Avenue Church of Christ (Davidson County, Tennessee)
Link House (Anderson County, Texas)
Linneman Building (Allen County, Ohio)
Linsay House (Johnson County, Iowa)
Linville Creek Bridge (Rockingham County, Virginia)
Linville Historic District (Avery County, North Carolina)
Linwood (Livingston County, New York)
Lion Brothers Company Building (Baltimore, Maryland)
Lippincott Mansion (Volusia County, Florida)
Lithgow Library (Kennebec County, Maine)
Litterer Laboratory (Davidson County, Tennessee)
Little American Mine (Koochiching County, Minnesota)
Little House (Victoria County, Texas)
Little Mountain Historic District (Newberry County, South Carolina)
Historic district showcasing industrial, religious and residential properties in Little Mountain, SC
Little Post Office (Martinsville, Virginia)
Little Red School (Mohave County, Arizona)
Little Silver Station (Monmouth County, New Jersey)
Little White House (Monroe County, Florida)
Littlefield House (Travis County, Texas)
Littleton Main Street (Arapahoe County, Colorado)
Littleton Town Building (Grafton County, New Hampshire)
Livestock Exchange Building (Buchanan County, Missouri)
Livingston Manor Historic District (Middlesex County, New Jersey)
Llano County Courthouse and Jail (Llano County, Texas)
Lloyd Hamilton Mott House (Johnson County, Kentucky)
Lloyd Heights Manor (Clark County, Wisconsin)
Victorian mansion slightly off the beaten path
Loa Tithing Office (Wayne County, Utah)
Lock and Dam No. 15 Historic District (Rock Island County, Illinois)
Lock and Dam No. 2 (Hennepin County, Minnesota)
Locke School (Middlesex County, Massachusetts)
Lockhardt, Charles H., House (Middlesex County, Massachusetts)
Locust Avenue School (Fairfield County, Connecticut)
Loft Historic District South (Baltimore, Maryland)
Logan Center School No.5 (Clay County, Iowa)
Logan Temple Barn (Cache County, Utah)
Lohman Funeral Home and Livery Stable (Milwaukee County, Wisconsin)
Funeral Home Repurposed as Executive Offices
Lollin Block (Salt Lake County, Utah)
Lombard Building (Marion County, Indiana)
Long, McCorkle and Murray Houses (Catawba County, North Carolina)
Long, William H., Memorial (Merrimack County, New Hampshire)
Longbranch Annex (St. Tammany Parish, Louisiana)
Longfellow School (Rutland County, Vermont)
Longfellow-Hastings House (Los Angeles County, California)
Longwood Historic District (Bronx County, New York)
Lookaway Hall (Aiken County, South Carolina)
Lookout Mountain Incline Railway (Hamilton County, Tennessee)
Lordville Presbyterian Church (Delaware County, New York)
Lorenzo and Emma Price House and Barn (Salt Lake County, Utah)
Loretto Heights Academy (Denver County, Colorado)
Lorin Cray House (Blue Earth County, Minnesota)
Loring, George, House (Middlesex County, Massachusetts)
Lorraine Apartments (Philadelphia County, Pennsylvania)
Lost River General Store (Hardy County, West Virginia)
Lottie Roth Block (Whatcom County, Washington)
Lou Ellen Parmelee House (Monterey County, California)
Loucks Grove Church (Adair County, Iowa)
Louie's Place (Stanislaus County, California)
Louis Ducros House (Pinellas County, Florida)
Historic home that was removed from the NRHP after being moved to a new location
Louis Hultgren House and Sand Pit (Pine County, Minnesota)
Louis Kissel House (Washington County, Wisconsin)
Queen Anne built by the patriarch of the Kissel industrial family
Louis W. Harris Flour Mill (Beaver County, Utah)
Louis Yanke Saloon (Waukesha County, Wisconsin)
Louise Cotton Mill (Mecklenburg County, North Carolina)
Louise Cotton Mill (Mecklenburg County, North Carolina)
Louise White Elementary School (Kane County, Illinois)
Lounsbury, Phineas Chapman, House (Fairfield County, Connecticut)
Lovejoy Homestead (Mendocino County, California)
Lovejoy, Charles, House (Essex County, Massachusetts)
Lover's Leap Bridge (Litchfield County, Connecticut)
Low Memorial Library, Columbia University (New York County, New York)
Lowe-Forman House (Orleans Parish, Louisiana)
Lowell Elementary School (Wyandotte County, Kansas)
Lowell Observatory (Coconino County, Arizona)
Lowell Post Office (Middlesex County, Massachusetts)
Lowenstein House (Shelby County, Tennessee)
Lower Humbert Bridge (Somerset County, Pennsylvania)
Lower Sunday River School (Oxford County, Maine)
Loy Kirksey House (Clark County, Arkansas)
Lubec Channel Light Station (Washington County, Maine)
Lucas County Courthouse (Lucas County, Iowa)
Lucas Troendle House (Blue Earth County, Minnesota)
Luce County Sheriff's House and Jail (Luce County, Michigan)
Luce Hall (Newport County, Rhode Island)
Lucius Coleman Hall House (Jackson County, North Carolina)
Ludington Building (Cook County, Illinois)
Ludlow Lagoon Clubhouse (Kenton County, Kentucky)
Ludwig and Christina Welk Homestead (Emmons County, North Dakota)
Lumb, Thomas, Three-Decker (Dewey St.) (Worcester County, Massachusetts)
Lumb, Thomas, Three-Decker (Winfield St.) (Worcester County, Massachusetts)
Lummis House (Los Angeles County, California)
Lumsden-Boone Building (Wake County, North Carolina)
Lund House (Harris County, Texas)
Lundberg, Charles, Three-Decker (Worcester County, Massachusetts)
LuNeack House (Hamilton County, Ohio)
Luverne Historic District (Crenshaw County, Alabama)
Lyceum, The (St. Louis County, Missouri)
Lyde Irby Darlington House (Laurens County, South Carolina)
Lyman House (Hartford County, Connecticut)
Lyman Reid House (Franklin County, Kansas)
Lynch--Probst House (DeWitt County, Texas)
Lyndon Bridge (Whiteside County, Illinois)
Pennsylvania through truss bridge over Rock River on 6th Avenue (Lyndon Road)
Lynn Armory (Essex County, Massachusetts)
Lynn Bank Block (Essex County, Massachusetts)
Lynn Public Library (Essex County, Massachusetts)
Lynx Creek District (Yavapai County, Arizona)
Lyons House (Vermilion Parish, Louisiana)
Lyric Theatre (Baltimore, Maryland)
M Street High School (Washington, District of Columbia)
M&M Cigarstore (Silver Bow County, Montana)
Saloon
M. A. Benton House (Tarrant County, Texas)
M. A. Withers House (Caldwell County, Texas)
M. B. Ray House (Ellis County, Texas)
M. Fred Bell Rental Cottage (Callaway County, Missouri)
M. Fred Bell Speculative Cottage (Callaway County, Missouri)
M. L. B. Sturkey House (McCormick County, South Carolina)
M. S. Payne House (Ellis County, Texas)
M.A. Disbrow and Company Buildings (Douglas County, Nebraska)
M.G. Michaelis Ranch (Hays County, Texas)
Mabee--Mayberry House (Yamhill County, Oregon)
Mabry-Van Pelt House (Salt Lake County, Utah)
MacDonell House (Allen County, Ohio)
Macedonia Baptist Church (Livingston Parish, Louisiana)
Macedonia Baptist Church (DeWitt County, Texas)
Macedonia Methodist Church (Amherst County, Virginia)
Machias Railroad Station (Washington County, Maine)
Machinery Row (Dane County, Wisconsin)
Mack's Chapel Cemetery (Perry County, Missouri)
Mack's Chapel Cemetery (Perry County, Missouri)
Mack-Belk House (York County, South Carolina)
Mackinac Point Lighthouse (Cheboygan County, Michigan)
Macksburg Lutheran Church (Clackamas County, Oregon)
MacMillan Chapel (Ada County, Idaho)
Macon County Courthouse (Macon County, Georgia)
Madison County Courthouse (Madison County, Ohio)
Madison Elementary School (Weber County, Utah)
Madison Morgan Cultural Center (Morgan County, Georgia)
Madrid Historic District (Santa Fe County, New Mexico)
Maeser School (Utah County, Utah)
MAGGIE S. MYERS (schooner) (Kent County, Delaware)
MAGIC (log canoe) (Talbot County, Maryland)
Magnolia Commercial Historic District (Columbia County, Arkansas)
Magnolia Heights Historic District (Leon County, Florida)
Magruder Plots (Payne County, Oklahoma)
Mahoning Creek bridge (Armstrong County, Pennsylvania)
Concrete arch bridge over Mahoning Creek on PA 1007
Mai Wah and Wah Chong Tai Buildings (Silver Bow County, Montana)
Chinese general store and noodle parlor built in 1899
Main Building (Fayette County, West Virginia)
Main Building, Arkansas Baptist College (Pulaski County, Arkansas)
Main Building, Tempe Normal School (Maricopa County, Arizona)
Main Building, Vassar College (Dutchess County, New York)
Main Hall (Bon Homme County, South Dakota)
Main Hall, Montana School of Mines (Silver Bow County, Montana)
Renaissance Revival college hall built in 1897
Main Street Commercial Buildings (Blue Earth County, Minnesota)
Main Street Commercial Historic District (Flathead County, Montana)
Main Street Historic District (McDowell County, North Carolina)