Owned by state government

18th Separate Company Armory (Warren County, New York)
1931 Tempe Bridge (Maricopa County, Arizona)
7th District Police Station (Cook County, Illinois)
Abo (Torrance County, New Mexico)
Absecon Lighthouse (Atlantic County, New Jersey)
Academy Hall (Erie County, Pennsylvania)
Adas Israel Synagogue (Washington, District of Columbia)
Adele Ilfeld Auditorium (San Miguel County, New Mexico)
Administration Building (Union County, Oregon)
Administration Building (Roosevelt County, New Mexico)
Administration Building (Otero County, New Mexico)
Agricultural Chemistry Building (Dane County, Wisconsin)
Member of the Henry Mall Historic District
Agricultural Engineering Building (Dane County, Wisconsin)
Member of the Henry Mall Historic District
Agriculture Building (Wake County, North Carolina)
Agriculture Hall (Dane County, Wisconsin)
Member of the Henry Mall Historic District
Air Science (Dona Ana County, New Mexico)
Alabama Insane Hospital (Tuscaloosa County, Alabama)
Alabama's oldest and largest inpatient psychiatric facility.
Alabama State Capitol (Montgomery County, Alabama)
Alamance Battleground State Historic Site (Alamance County, North Carolina)
Albert W. Thompson Hall (Whitman County, Washington)
Alchesay Canyon Bridge (Maricopa County, Arizona)
Concrete arch bridge over Alchesay Canyon on AZ 88
Alcorn State University Historic District (Claiborne County, Mississippi)
Aliiolani Hale (Honolulu County, Hawaii)
Allen House (Alamance County, North Carolina)
Alliance Furnace (Fayette County, Pennsylvania)
Aloha Tower (Honolulu County, Hawaii)
Alston House (Moore County, North Carolina)
American Legion Forest CCC Shelter (Litchfield County, Connecticut)
Ammons Hall (Larimer County, Colorado)
Ampere Station (Essex County, New Jersey)
AN/FPS-35 Radar Tower and Antenna (Suffolk County, New York)
Anaconda Copper Mining Company Smoke Stack (Deer Lodge County, Montana)
Anadarko Armory (Caddo County, Oklahoma)
Anderson House and Lexington Battlefield (Lafayette County, Missouri)
Anderson-Smith House (McCracken County, Kentucky)
Restored Civil War Era mansion now serving as a welcome center/rest area
Andrews-Duncan House (Wake County, North Carolina)
Anna Russell Cole Auditorium (Davidson County, Tennessee)
Appomattox (Shipwreck) (Milwaukee County, Wisconsin)
Largest wooden steam freighter on the Great Lakes that ran aground in 1905
Appomattox River Bridge (Appomattox County, Virginia)
AR 289 Bridge Over English Creek (Fulton County, Arkansas)
Arbor Lodge (Otoe County, Nebraska)
Arizona State Capitol Building (Maricopa County, Arizona)
Arkansas 7/51 Bridge (Clark County, Arkansas)
Through truss bridge over Ouachita River at Arkadelphia carrying AR 7, AR 8, and AR 51
Arkansas Highway 57 Bridge (Ouachita County, Arkansas)
Pony truss bridge over the railroad tracks on AR 57 in Stephens
Arkansas State Capitol (Pulaski County, Arkansas)
Armory of the Kentish Guards (Kent County, Rhode Island)
Armour's Warehouse (LaSalle County, Illinois)
Arrawanna Bridge (Middlesex County, Connecticut)
Art Annex (Bernalillo County, New Mexico)
Ash Fork Maintenance Camp #1 (Yavapai County, Arizona)
Ashland Armory (Boyd County, Kentucky)
Ashland Bridge (New Castle County, Delaware)
Town lattice covered bridge over Red Clay Creek
Ashland Tuberculosis Hospital (Boyd County, Kentucky)
Assay Office (Ada County, Idaho)
Astor Fur Warehouse (Crawford County, Wisconsin)
Athens State Hospital (Athens County, Ohio)
Athens State Hospital Cow Barn (Athens County, Ohio)
Auburn Brick Road (Sangamon County, Illinois)
Auditorium and Recreation Building (Otero County, New Mexico)
Aurora Avenue Bridge (King County, Washington)
AuSable Chasm Bridge (Clinton County, New York)
Steel arch bridge over AuSable River on US 9
Avery Point Lighthouse (New London County, Connecticut)
B&P RR - Mahoning Creek Bridge #2 (Armstrong County, Pennsylvania)
Deck truss bridge over Mahoning Creek on Buffalo & Pittsburgh Railroad
B. B. Moeur Activity Building (Maricopa County, Arizona)
Babcock Building, South Carolina State Hospital (Richland County, South Carolina)
Bailey Hall (Douglas County, Kansas)
Bailey Hall houses several of the Liberal Arts College programs.
Barclay House (Bedford County, Pennsylvania)
Barnard Observatory (Lafayette County, Mississippi)
Barnegat Lighthouse (Ocean County, New Jersey)
Barnwell-Gough House (Beaufort County, South Carolina)
Barrackville Covered Bridge (Marion County, West Virginia)
Burr arch-truss bridge over Finch's Run on CH 21
Bastrop State Park (Bastrop County, Texas)
Batsto Village (Burlington County, New Jersey)
Battery 223 (Cape May County, New Jersey)
Bayfield Fish Hatchery (Bayfield County, Wisconsin)
A Queen Anne style house that served as a fish hatchery for many years, now serving as a visitor center
Beaver Creek Bridge (Wichita County, Texas)
Pony truss bridge over Beaver Creek on FM 2326
Beech Fork Bridge, Mackville Road (Washington County, Kentucky)
Belle Meade (Davidson County, Tennessee)
Bellefonte Armory (Centre County, Pennsylvania)
Bells Landing Bridge (Clearfield County, Pennsylvania)
Through truss bridge over West Branch Susquehanna River on PA 3005
Beloit Water Tower (Rock County, Wisconsin)
Ben Laney Bridge (Ouachita County, Arkansas)
Three-span pony truss bridge over Ouachita River on US 79B in Camden
Bennett Place State Historic Site (Durham County, North Carolina)
Bennington Battle Monument (Bennington County, Vermont)
Stone obelisk commemorating the Battle of Bennington in 1777.
Bentonville Battleground State Historic Site (Johnston County, North Carolina)
Berkeley Springs State Park (Morgan County, West Virginia)
Big Bone Lick State Park (Boone County, Kentucky)
Big Creek Bridge No. 01180 (Lane County, Oregon)
Birdwood (Albemarle County, Virginia)
Black River Bridge (Randolph County, Arkansas)
Through truss bridge with a center swing span over Black River on US 67 at Pocahontas
Blackledge River Railroad Bridge (New London County, Connecticut)
Blackwell Armory (Kay County, Oklahoma)
Blaine, James G., House (Kennebec County, Maine)
Blairsville Armory (Indiana County, Pennsylvania)
Blandwood (Guilford County, North Carolina)
Blossomland Bridge (Berrien County, Michigan)
Bascule bridge over St. Joseph River on M-63 in St. Joseph
Blue Hawk Peak Ranch (Pawnee County, Oklahoma)
Blue Pond (Bollinger County, Missouri)
Bodie Historic District (Mono County, California)
Bollinger Mill (Cape Girardeau County, Missouri)
Bonner House (Beaufort County, North Carolina)
Botanical and Horticultural Laboratory (Larimer County, Colorado)
Boulder Creek Bridge (Maricopa County, Arizona)
Boulder Dam Park Museum (Clark County, Nevada)
Bourbon Iron Works (Bath County, Kentucky)
Bowden Hall (Grant County, New Mexico)
Bowling Green OMS #10 (Warren County, Kentucky)
Boxwood Hall (Union County, New Jersey)
Bradford Armory (McKean County, Pennsylvania)
Branford House (New London County, Connecticut)
Breezedale (Indiana County, Pennsylvania)
Bridge in Dreher Township (Wayne County, Pennsylvania)
Bridge in Franklin Township (Greene County, Pennsylvania)
Open-spandrel arch bridge over South Fork Tenmile Creek on PA 188 in Morrisville
Bridge in French Creek Township (Mercer County, Pennsylvania)
Bridge in Jenner Township (Somerset County, Pennsylvania)
Bridge in Johnstown City (Cambria County, Pennsylvania)
Through truss bridge over Stonycreek River on PA 3022 in Johnstown
Bridge in Portage Township (Cambria County, Pennsylvania)
Bridge in Rockdale Township (Crawford County, Pennsylvania)
Through truss bridge over French Creek on PA 1016
Bridge in South Beaver Township (Beaver County, Pennsylvania)
Two-span pony truss bridge over Little Beaver Creek on Watts Mill Road
Bridge of Lions (St. Johns County, Florida)
Brigham Young Winter Home and Office (Washington County, Utah)
Brown Hall (Socorro County, New Mexico)
Brunswick Town Historic District (Brunswick County, North Carolina)
Buckeye Furnace (Jackson County, Ohio)
Buckstaff Observatory (Winnebago County, Wisconsin)
A three dome, amateur observatory and weather observation station, dismantled in 2011.
Buena Vista (New Castle County, Delaware)
Buffalo State Asylum for the Insane (Erie County, New York)
Buffington Island (Meigs County, Ohio)
Bunker Hill Monument (Suffolk County, Massachusetts)
Bushy Run Battlefield (Westmoreland County, Pennsylvania)
Butler Armory (Butler County, Pennsylvania)
Cache River Bridge (Lawrence County, Arkansas)
Abandoned pony truss bridge over Cache River on US 412 between Walnut Ridge and Paragould
Caldwell Presbyterian Church Manse (Essex County, New Jersey)
Calhoun Depot (Gordon County, Georgia)
California State Capitol (Sacramento County, California)
Cama Beach Resort (Island County, Washington)
Cambridge Springs Bridge - Grant Street (Crawford County, Pennsylvania)
Camp George West Historic District (Jefferson County, Colorado)
Camp Hancock Site (Burleigh County, North Dakota)
Camp Randall (Dane County, Wisconsin)
Civil War Era US Army Camp now home of University of Wisconsin Badger Athletics
Camp Rhododendron (Monongalia County, West Virginia)
Historic buildings in Coopers Rock State Forest
Camp Washington-Carver Complex (Fayette County, West Virginia)
Campus Fire Station (Payne County, Oklahoma)
Cannon's Ferry (Sussex County, Delaware)
Cape Creek Bridge No. 01113 (Lane County, Oregon)
Cape Florida Lighthouse (Miami-Dade County, Florida)
Cape Henry Lighthouse (Virginia Beach, Virginia)
Cape Meares Lighthouse (Tillamook County, Oregon)
Capehart House (Wake County, North Carolina)
Capitol Building (Salt Lake County, Utah)
Capitol Complex Historic District (Kennebec County, Maine)
Capitol Park (Kennebec County, Maine)
Capt. Charles C. Henderson House (Clark County, Arkansas)
Captain Creek Bridge (Lincoln County, Oklahoma)
Pony truss bridge over Captain Creek on Business OK 66 in Wellston
CAPTAIN MERIWETHER LEWIS (dredge) (Nemaha County, Nebraska)
Carnifex Ferry State Park (Nicholas County, West Virginia)
Carr's Hill (Albemarle County, Virginia)
Carrie Tingley Hospital Historic District (Sierra County, New Mexico)
Carrington-Covert House (Travis County, Texas)
Carrolton Covered Bridge (Barbour County, West Virginia)
Cascade Theatre (Shasta County, California)
Cashier's House (Erie County, Pennsylvania)
Cass Scenic Railroad (Pocahontas County, West Virginia)
Cataract Covered Bridge (Owen County, Indiana)
Cathedral of Learning (Allegheny County, Pennsylvania)
535 feet tall 42 story skyscraper
Cave-In-Rock (Hardin County, Illinois)
Cedar Creek Grist Mill (Clark County, Washington)
Central Building, State Lunatic Asylum (Baldwin County, Georgia)
Central Ohio Lunatic Asylum (Franklin County, Ohio)
Central Receiving Building (Otero County, New Mexico)
Central State Hospital Historic District (Dodge County, Wisconsin)
A maximum security correctional institution located in Waupun, Wisconsin
Chapin Mine Steam Pump Engine (Dickinson County, Michigan)
A steeple-compound condensing engine capable of lifting 200 tons of water a minute
Charles A. Lindbergh House and Park (Morrison County, Minnesota)
Charles Robinson House (Sheboygan County, Wisconsin)
Chatsworth Apartments (Wayne County, Michigan)
Cherokee Female Seminary (Cherokee County, Oklahoma)
Cherokee State Park (Marshall County, Kentucky)
Cherry Hall (Warren County, Kentucky)
Cherrytree Township Bridge (Venango County, Pennsylvania)
Chesapeake and Ohio 2755 Steam Locomotive (Logan County, West Virginia)
Chimney Point Tavern (Addison County, Vermont)
Chinook Point (Pacific County, Washington)
Christian Pershing Barn (Tuscarawas County, Ohio)
Christian Turck House (Waukesha County, Wisconsin)
1835 log home, built in Germantown, Washington County, Wisconsin and relocated to Old World Wisconsin, a museum of early Wisconsin structures.
Citadel Rock (Chouteau County, Montana)
City Hall Subway Station (IRT) (New York County, New York)
City of Rocks (Cassia County, Idaho)
City Waterway Bridge (Pierce County, Washington)
Vertical lift bridge over Foss Waterway on E. 11th Street in Tacoma
Clarence R. Prescott House (Missoula County, Montana)