Built 1876

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A. Larson & Co. Building (Kandiyohi County, Minnesota)
Abbot Hall (Essex County, Massachusetts)
Abraham Castetter House (Washington County, Nebraska)
Academy Building (Bristol County, Massachusetts)
Adath Israel Cemetery (Jefferson County, Kentucky)
Alfred Steinheim Museum (Allegany County, New York)
All Saints' Chapel (Ulster County, New York)
Amboy Illinois Central Depot (Lee County, Illinois)
Anderson Homestead (Clay County, South Dakota)
Ashville Depot (Pickaway County, Ohio)
Atlanta Historic District (Elmore County, Idaho)
Baltic Mill (New London County, Connecticut)
Five story mill consisting of granite stone blocks
Bank Block (Penobscot County, Maine)
Barber-Scotia College (Cabarrus County, North Carolina)
Bay covered bridge (Vinton County, Ohio)
Multiple kingpost bridge moved to the park in 1966.
Bay View (Emmet County, Michigan)
Bellville Village Hall (Richland County, Ohio)
Belmont Abbey Historic District (Gaston County, North Carolina)
Benjamin and Hilarita Lyford House (Marin County, California)
Berea Union Depot (Cuyahoga County, Ohio)
Blair County Courthouse (Blair County, Pennsylvania)
Blue Mountain House Annex (Hamilton County, New York)
Bowen Mansion (Pueblo County, Colorado)
Box Elder Stake Tabernacle (Box Elder County, Utah)
Bradford House (Androscoggin County, Maine)
Landmark has been demolished
Bridge (Otoe County, Nebraska)
Bridge in Nicholson Township (Wyoming County, Pennsylvania)
Brigham City (Navajo County, Arizona)
Brookside Farm and Mill (Grayson County, Virginia)
Building at 1735--1737 Webster Street (San Francisco County, California)
Building at 1813--1813B Sutter Street (San Francisco County, California)
Building at 33--35 Beideman Place (San Francisco County, California)
C.F. and Mary Singmaster House (Keokuk County, Iowa)
Calvary Episcopal Church (Jefferson County, Kentucky)
Cantonment Reno (Johnson County, Wyoming)
Capt. John Halstead Farm (Nicholas County, West Virginia)
Cassius Clark Thompson House (Columbiana County, Ohio)
Cataract Covered Bridge (Owen County, Indiana)
Cedar Creek Grist Mill (Clark County, Washington)
Centennial Bridge (Lehigh County, Pennsylvania)
Centennial Malt House (St. Louis, Missouri)
Centennial National Bank (Philadelphia County, Pennsylvania)
Center Arbor (Davie County, North Carolina)
Central Vermont Railroad Pier (New London County, Connecticut)
Chamois Public School (Osage County, Missouri)
Charles Schaeffer School (Philadelphia County, Pennsylvania)
Charter Oak Firehouse (New Haven County, Connecticut)
Chestnut Grove (Hardin County, Kentucky)
Chief Lippert Fire Station (Milwaukee County, Wisconsin)
19th Century fire station, remodeled and repurposed as an office building
Chizuk Amuno Synagogue (Baltimore, Maryland)
Chrisco Cemetery (Shannon County, Missouri)
Church of Our Lady of Grace (Hudson County, New Jersey)
Cliffside (Rockland County, New York)
Clossman Hardware Store (Muskingum County, Ohio)
Clotworthy--McMillan House (Wasatch County, Utah)
Conestee Mill (Greenville County, South Carolina)
Confederate Monument (Portsmouth, Virginia)
Continental Stove Works (Montgomery County, Pennsylvania)
Cook, William, House (Middlesex County, Massachusetts)
Coralville Public School (Johnson County, Iowa)
Open by appointment
County Line Bowstring (Unspecified county, Kansas)
Bowstring truss bridge over West Creek on Republic Road, northwest of Hollis
Courthouse Square Historic District (Appanoose County, Iowa)
Covered Bridge (Ozaukee County, Wisconsin)
Lattice through truss bridge over Cedar Creek on Covered Bridge Road
Crescent Hill Reservoir (Jefferson County, Kentucky)
Crompton Free Library (Kent County, Rhode Island)
Crouch--Ramsey Family Farm (Coffee County, Tennessee)
Culbertson House (Boyd County, Kentucky)
Damascus School (Clackamas County, Oregon)
Daniel A. Messler Homestead (Clay County, South Dakota)
Dart's Mill Historic District (Hunterdon County, New Jersey)
Davol, William C., Jr., House (Bristol County, Massachusetts)
Decker House Hotel (Jackson County, Iowa)
Department Store Historic District (Hartford County, Connecticut)
Desmond--Farnham--Hustis House (Milwaukee County, Wisconsin)
one of the Milwaukee's finest remaining Victorian Gothic-style homes
Division Street Bridge (Providence County, Rhode Island)
Stone arch bridge over Seekonk River on Division Street in Pawtucket
Dockery House (De Soto County, Mississippi)
Dr. Joseph M. Bynum House (Alcorn County, Mississippi)
Dull Knife Battlefield (Johnson County, Wyoming)
Dunns Block (Alameda County, California)
Dutch Ridge Historic District (Allen County, Indiana)
East Chop Light (Dukes County, Massachusetts)
East Markham Street Historic District (Pulaski County, Arkansas)
East Ward School (Clinton County, Michigan)
Echo Bridge (Unspecified county, Massachusetts)
Echo Church and School (Summit County, Utah)
Eckhardt Stores (DeWitt County, Texas)
Edward Tolton House (Beaver County, Utah)
Elizabeth Alice Austen House (Richmond County, New York)
Emmanuel Shearith Israel Chapel (Denver County, Colorado)
Empire Ranch (Pima County, Arizona)
Engelhard House (Jefferson County, Kentucky)
Ephesus Cemetery (Nevada County, Arkansas)
Eureka Lock and Lock Tender's House (Winnebago County, Wisconsin)
The last lock in operation on the Upper Fox River
Eveland Bridge (Mahaska County, Iowa)
Fairview Cemetery (Middlesex County, Massachusetts)
Farmers Market (York County, Pennsylvania)
Finn's Point Rear Range Light (Salem County, New Jersey)
First African Baptist Church (Richmond, Virginia)
First Baptist Church of Fairport (Monroe County, New York)
First Congregational Church (Waukesha County, Wisconsin)
First National Bank (Barren County, Kentucky)
First Presbyterian Church (Montgomery County, Tennessee)
First Universalist Church (Androscoggin County, Maine)
Fort Sam Houston (Bexar County, Texas)
Fort Street Presbyterian Church (Wayne County, Michigan)
Framingham Reservoir No. 1 Dam and Gatehouse (Middlesex County, Massachusetts)
Framingham Reservoir No. 3 Dam and Gatehouse (Middlesex County, Massachusetts)
Francis Bookwalter House (Clark County, Ohio)
Francis H. Bartlett House (Fillmore County, Minnesota)
Free Church (Steuben County, Indiana)
Fry's Trading Post (Boundary County, Idaho)
G.A.R. Hall (Worcester County, Massachusetts)
Gallun Tannery Historic District (Milwaukee County, Wisconsin)
A campus of former industrial buildings, now being developed into residential use
Garten Verein Pavilion (Galveston County, Texas)
Goodspeed Opera House (Middlesex County, Connecticut)
Grace Episcopal Church (Onondaga County, New York)
Grace Episcopal Church (Maury County, Tennessee)
Grace Memorial Episcopal Church (Tangipahoa Parish, Louisiana)
Grand Hotel (Brown County, Minnesota)
Grand Union Hotel (Ventura County, California)
Grove Street Elementary School (Providence County, Rhode Island)
Grove Street School (Worcester County, Massachusetts)
Grundy Mill Complex (Bucks County, Pennsylvania)
Guadalupe Ranch (Culberson County, Texas)
Hall's Opera Block (Livingston County, New York)
Harriet S. Shepherd House (Beaver County, Utah)
Harrison Stuckslager House (Linn County, Iowa)
Harvey House (Marion County, Kansas)
Haven B. Howe House (Pulaski County, Virginia)
Henry Brown House (Douglas County, Oregon)
Henry Clay Moss House (Edgar County, Illinois)
Henry Hirshfeld House and Cottage (Travis County, Texas)
Herbert M. Fox House (Sherburne County, Minnesota)
Herter Farmstead (Lancaster County, Nebraska)
Hillside Cemetery (Calhoun County, Alabama)
Hollenstein Wagon and Carriage Factory (Dodge County, Wisconsin)
Hopewell Station (Mercer County, New Jersey)
House at 322 Haven Street (Middlesex County, Massachusetts)
Howard Block (Plymouth County, Massachusetts)
Hudson Wilson House (Rice County, Minnesota)
Initial Rock (Billings County, North Dakota)
IOOF Centennial Building (Alpena County, Michigan)
Iron Turbine Windmill (Yavapai County, Arizona)
Irving Square Historic District (Middlesex County, Massachusetts)
Isaac Pollack House (Montgomery County, Ohio)
Isaac Woolen House (Jackson County, Oregon)
J. M. and Emily Daniel House (Lamar County, Texas)
James Cawley House (Scott County, Iowa)
James Collings Jr., House (Bear Lake County, Idaho)
James Jens and Martha Jenson House (Bosque County, Texas)
James L. Gates House (Clark County, Wisconsin)
Gothic Revival style house built prior to 1876
James Millikin House (Macon County, Illinois)
Janney House (Loudoun County, Virginia)
Jerome Historic District (Yavapai County, Arizona)
Jerusalem District No. 5 Schoolhouse (Nassau County, New York)
Joel and Rena Hawkins House (San Benito County, California)
John and Coralin Evans Ranch (Meade County, South Dakota)
John Bond Trevor House (Westchester County, New York)
John Dickinson Dopf Mansion (Atchison County, Missouri)
John James Jones House (Burke County, Georgia)
John R. Stinson House (Harrison County, Texas)
John W. McClain House (Hendricks County, Indiana)
Jud Christie Covered Bridge No. 95 (Columbia County, Pennsylvania)
Covered bridge over Little Fishing Creek
Jureczki House (Bandera County, Texas)
Kaahumanu Church (Maui County, Hawaii)
Kelly Family Home (Montgomery County, Ohio)
Kimball House (Yell County, Arkansas)
King's Hall (Buchanan County, Iowa)
Knightstown Academy (Henry County, Indiana)
Kreigbaum Covered Bridge (Unspecified county, Pennsylvania)
Kurtz Mill Covered Bridge (Lancaster County, Pennsylvania)
Laclede County Jail (Laclede County, Missouri)
LaPorte City Town Hall and Fire Station (Black Hawk County, Iowa)
Former Town Hall and Fire Station now serving as a museum
LeMoyne Crematory (Washington County, Pennsylvania)
Levering Hall (Morrow County, Ohio)
Lewis County Fairgrounds (Lewis County, New York)
Liberty Fire Company No. 5 (Berks County, Pennsylvania)
Licking County Courthouse (Licking County, Ohio)
Limerick--Frazier House (Travis County, Texas)
Little River Light Station (Washington County, Maine)
Lone Tree School (Bureau County, Illinois)
Long Island City Courthouse Complex (Queens County, New York)
Lucius Frierson House (Maury County, Tennessee)
Lyman Block (Plymouth County, Massachusetts)
Mahler and Carolina Trust Buildings (Wake County, North Carolina)
Manitou Springs Historic District (El Paso County, Colorado)
Manley, William M., House (Bristol County, Massachusetts)
Maple Hill (Hardin County, Kentucky)