Built during 1890s

Kaller, Erick, Three-Decker (Worcester County, Massachusetts)
Kalorama Triangle Historic District (Washington, District of Columbia)
Kanabec County Courthouse (Kanabec County, Minnesota)
Kanawha County Courthouse (Kanawha County, West Virginia)
Kane Manor Inn (McKean County, Pennsylvania)
Kansas City Public Library (Jackson County, Missouri)
Kansas City Southern Railroad Bridge, Cross Bayou (Caddo Parish, Louisiana)
Waddell "A" truss bridge over Cross Bayou on the Kansas City Southern Railroad in Shreveport, near Spring Street. One of only 2 surviving Waddell "A" truss bridges in the US, the Linn Creek Bridge in Missouri being the other.
Karl Mathie House (Marathon County, Wisconsin)
Karnak Flats (Erie County, New York)
Kasota Post Office (Le Sueur County, Minnesota)
Built from Kasota Stone quarried right there in Kasota, MN during the 1800s.
Kasota Village Hall (Le Sueur County, Minnesota)
Kasson Water Tower (Dodge County, Minnesota)
Katherine Anne Porter House (Hays County, Texas)
Katherine Cooper House (Tuscarawas County, Ohio)
Katonah Village Historic District (Westchester County, New York)
Katy Depot (Hunt County, Texas)
Kauffman House (Grand County, Colorado)
Kearns-St. Ann's Orphanage (Salt Lake County, Utah)
Keefe Row (Laramie County, Wyoming)
Keene Valley Library (Essex County, New York)
Keene, Walter, House (Middlesex County, Massachusetts)
Kehilath Anshe Ma'ariv Synagogue (Cook County, Illinois)
Keller's Covered Bridge (Lancaster County, Pennsylvania)
Covered bridge over Cocalico Creek on Middle Creek Road
Kelley House (Hamilton County, Tennessee)
Kelly Round Barn (Delaware County, New York)
Kelton House (Wright County, Missouri)
Keltys Worker Housing (Angelina County, Texas)
Kemmerer Hotel (Lincoln County, Wyoming)
Kemp B. Johnson House (Wake County, North Carolina)
Kendall Mill Historic District (Kershaw County, South Carolina)
Kenefick Park (Douglas County, Nebraska)
Overlooking the I-80 bridge over the Missouri River to welcome westbound travelers to Nebraska
Keney Tower (Hartford County, Connecticut)
Kennard House (Gonzales County, Texas)
Kennebec River Light Station (Sagadahoc County, Maine)
Kennedy Cottage (Essex County, New York)
Kennedy Mine Historic District (Amador County, California)
Kenney's Crossing (Kenton County, Kentucky)
Kennywood Park (Allegheny County, Pennsylvania)
Kensington Historic District (Montgomery County, Maryland)
Kentucky National Bank (Jefferson County, Kentucky)
Kenwood Historic District (Garfield County, Oklahoma)
Kenyon's Department Store (Washington County, Rhode Island)
Kernodle--Pickett House (Alamance County, North Carolina)
Kerr--Booth House (White County, Arkansas)
Kestner Homestead (Grays Harbor County, Washington)
KESTREL (steam yacht) (Hudson County, New Jersey)
Key Memorial Chapel (Iredell County, North Carolina)
Keyhole House (Adams County, Mississippi)
Keys Desert Queen Ranch (San Bernardino County, California)
Keystone School (Pennington County, South Dakota)
Keystone School (Macon County, Tennessee)
Keysville Railroad Station (Charlotte County, Virginia)
Kilgore Mill Covered Bridge and Mill Site (Barrow County, Georgia)
Covered Town lattice truss bridge over Appalachee River on Briscoe Mill Rd. (Carl Davis Rd.)
Killingsworth Farm (Franklin County, Georgia)
Kilpi Hall (Ashtabula County, Ohio)
Kilsyth Terrace (Norfolk County, Massachusetts)
Kimball Castle (Belknap County, New Hampshire)
Kimball House (Champaign County, Ohio)
Kimberly Crest (San Bernardino County, California)
King-Runkle House (Charlottesville, Virginia)
Kingfisher College Site (Kingfisher County, Oklahoma)
Kings County Courthouse (Kings County, California)
Kingsbury County Courthouse (Kingsbury County, South Dakota)
Kinston Fire Station-City Hall (Lenoir County, North Carolina)
Kirkland Grove Campground (Northumberland County, Virginia)
Kirkland Hotel (Ulster County, New York)
Kirkwood Missouri Pacific Depot (St. Louis County, Missouri)
Kister Mill (Wayne County, Ohio)
Kistler House (Middlesex County, Massachusetts)
Kitson Woolen Mill (Monroe County, Pennsylvania)
Klee Funeral Parlor (Henderson County, Kentucky)
Klein Dairy Farmhouse (Outagamie County, Wisconsin)
Queen Anne house that was part of Kaukauna's commercial development
Klipsan Beach Life Saving Station (Pacific County, Washington)
Klondike Hotel (Crawford County, Iowa)
Knapp-Astor House (Milwaukee County, Wisconsin)
Wood framed, Georgian style house from 1891
Knickerbocker Field Club (Kings County, New York)
Knickerbocker Press Building (Westchester County, New York)
Knife River Bridge near Stanton (Mercer County, North Dakota)
Knights of Pythias Building and Theatre (Decatur County, Indiana)
Knights of Pythias Pavilion (Williamson County, Tennessee)
Knollwood (Cheshire County, New Hampshire)
Knox District School No. 5 (Albany County, New York)
Knox Mansion (Fulton County, New York)
Kokomo City Building (Howard County, Indiana)
Kone-Cliett House (Hays County, Texas)
Kootenai County Jail (Kootenai County, Idaho)
Kossuth Street School (Passaic County, New Jersey)
Krenn School (Doddridge County, West Virginia)
Kreuzer Ranch (Napa County, California)
Krietz House (Yamhill County, Oregon)
Krohne Spring House (Park County, Montana)
Kruempelman Farmhouse (Kenton County, Kentucky)
Krumdiack Homestead (San Juan County, Washington)
Kullgren House (Boulder County, Colorado)
Kurth--Glover House (Angelina County, Texas)
Kurtz-Van Sicklin House (Washington County, Idaho)
Kutztown 1892 Public School Building (Berks County, Pennsylvania)
L'Ecole Saintes-Anges (Franklin County, Vermont)
L. C. Ranch Headquarters (Grant County, New Mexico)
L. D. Fargo Public Library (Jefferson County, Wisconsin)
Fieldstone structure serving the community as a library since 1902
L. D. Hickerson House (Coffee County, Tennessee)
L. Haas Store (White County, Illinois)
L.I. Roe House (Chippewa County, Wisconsin)
L.W. Ross House (Spencer County, Kentucky)
La Grange Church and Cemetery (Brevard County, Florida)
La Lomita Historic District (Hidalgo County, Texas)
La Madrilena (Cameron County, Texas)
La Nueva Libertad (Cameron County, Texas)
La Pointe Light Station (Ashland County, Wisconsin)
La Riviere (Radford, Virginia)
La Rue United Methodist Church (Marion County, Ohio)
Red brick and stone church
Labold House and Gardens (Scioto County, Ohio)
LaBorde House, Store and Hotel (Starr County, Texas)
Lac qui Parle County Courthouse (Lac qui Parle County, Minnesota)
Lacona Railroad Station and Depot (Oswego County, New York)
Laconia Passenger Station (Belknap County, New Hampshire)
Ladbury Church (Barnes County, North Dakota)
Ladd Observatory (Providence County, Rhode Island)
Ladd's Addition Historic District (Multnomah County, Oregon)
Ladson Presbyterian Church (Richland County, South Carolina)
Lady Tree Lodge (Franklin County, New York)
Lafayette Apartment Building (Washington, District of Columbia)
Lafayette Hardware Store (Lafayette Parish, Louisiana)
Lafayette McQuown House (Iron County, Michigan)
LaFollette Coke Ovens (Campbell County, Tennessee)
LaFollette House (Campbell County, Tennessee)
Lagonda Club Building (Clark County, Ohio)
LaGrande City Hall & Fire Department (Union County, Oregon)
Fire house/city hall built 1899 with additions in 1912, 1924
LaGrange Presbyterian Church (Lenoir County, North Carolina)
LaHarpe City Hall (Hancock County, Illinois)
Lake Benton Opera House (Lincoln County, Minnesota)
Lake City City Hall (Wabasha County, Minnesota)
Lake City Water Standpipe (Calhoun County, Iowa)
Lake Cochituate Dam (Middlesex County, Massachusetts)
Lake Compounce Carousel (Hartford County, Connecticut)
Lake Ditch Bridge (Morgan County, Indiana)
Lake Madison Lutheran Church (Lake County, South Dakota)
Lake Oswego Odd Fellows Hall (Clackamas County, Oregon)
Lake Park (Milwaukee County, Wisconsin)
A 138 acre park, designed by Frederick Law Olmsted, located on the shore of Lake Michigan on Milwaukee's East Side
Lake Railroad Station (Scott County, Mississippi)
Lake-Little House (Jefferson County, Washington)
Lakeside Development (Chittenden County, Vermont)
Lakeside Mills Historic District (Alamance County, North Carolina)
Lakeside Press Building (Cook County, Illinois)
Lakeview Tithing Office (Utah County, Utah)
Lakewood Heights Historic District (Fulton County, Georgia)
Lakewood Theatre (Somerset County, Maine)
Lamb Block (Androscoggin County, Maine)
Lamb's Creek Bridge (Morgan County, Indiana)
Lambert Building (St. Louis, Missouri)
Lancaster and Chester Railway (Lancaster County, South Carolina)
Long running South Carolina shortline railroad
Land Title Building (Philadelphia County, Pennsylvania)
Lander Park Carousel (Dickinson County, Kansas)
Landt Building (Hamilton County, Ohio)
Langhorne Manor School (Bucks County, Pennsylvania)
Langmaid Terrace (Middlesex County, Massachusetts)
Langston Clark Barn (Blount County, Tennessee)
Lansing T. Smith House (Calhoun County, Alabama)
Larimer School (Allegheny County, Pennsylvania)
Larimore City Hall (Grand Forks County, North Dakota)
LaRochelle, Napoleon, Two-Family House (Worcester County, Massachusetts)
Larsen-Noyes House (Sanpete County, Utah)
Larson--Hellieson House (Yakima County, Washington)
Las Dos Naciones Cigar Factory (Santa Cruz County, Arizona)
LaSalla House (Boulder County, Colorado)
Lassen Hotel (Lake County, Indiana)
Latimer School (Allegheny County, Pennsylvania)
Latta Historic District No. 1 (Dillon County, South Carolina)
Latta Historic District No. 2 (Dillon County, South Carolina)
Lattimer House (White County, Arkansas)
Lattin-Crandall Octagon Barn (Schuyler County, New York)
Laura Ingalls Wilder House (Wright County, Missouri)
Laura Westphal House (Jackson County, Mississippi)
Laurel High School (Prince George's County, Maryland)
Laurinburg Commercial Historic District (Scotland County, North Carolina)
Lauritsen Cabin (Kenai Peninsula Borough, Alaska)
Lavaca County Courthouse (Lavaca County, Texas)
Lavonia Roller Mill (Franklin County, Georgia)
Lawler-Hetherington Double House (Yavapai County, Arizona)
Lawrence Brown House (Polk County, Florida)
Lawrence County Jail (Lawrence County, Tennessee)
Lawrence Park Historic District (Westchester County, New York)
Layton Bridge (Fayette County, Pennsylvania)
LDS Park City Meetinghouse (Summit County, Utah)
Le Grand Bridge (Tama County, Iowa)
Le Petit Trianon (Santa Clara County, California)
Le Sueur County Courthouse and Jail (Le Sueur County, Minnesota)