Built during 1830s

Chelsea Historic District (New York County, New York)
Chemung Canal Bank Building (Chemung County, New York)
Chemung County Courthouse Complex (Chemung County, New York)
Chenango Canal Summit Level (Madison County, New York)
Cheney Brothers Historic District (Hartford County, Connecticut)
Cherrydale (Sampson County, North Carolina)
Chesterfield (Knox County, Tennessee)
Chickering House (Essex County, Massachusetts)
Chief Wapello's Memorial Park (Wapello County, Iowa)
Chief's House (Choctaw County, Oklahoma)
Chretien Point Plantation (St. Landry Parish, Louisiana)
Christ Church Glendower (Albemarle County, Virginia)
Christ Episcopal Church (Erie County, Ohio)
Christ Episcopal Church (Westchester County, New York)
Christ Episcopal Church (Delaware County, New York)
Christian Allemong House (Jefferson County, West Virginia)
Christian Bechdel II House (Centre County, Pennsylvania)
Christian Iutzi Farm (Butler County, Ohio)
Christian Oyer Jr., House (Huntingdon County, Pennsylvania)
Christian Ridge Historic District (Clinton County, Indiana)
Christian Thomas Shultz House (Forsyth County, North Carolina)
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.
Christopher Willis House (Yates County, New York)
Church of Christ, Swansea (Bristol County, Massachusetts)
Church Street East Historic District (Mobile County, Alabama)
Cincinnati and Whitewater Canal Tunnel (Hamilton County, Ohio)
Lost Tunnel on Formerly Cincinati & Whitewater Canal
Cincinnatus Historic District (Cortland County, New York)
City Cemetery (Travis County, Texas)
City Cemetery (Washington County, Georgia)
City Hall (Essex County, Massachusetts)
Clapp, Charles Q., House (Cumberland County, Maine)
Clapp, George, House (Worcester County, Massachusetts)
Clarendon House (Rutland County, Vermont)
Claridon Congregational Church (Geauga County, Ohio)
Clarke County Courthouse (Old) (Clarke County, Virginia)
Clarke--Glover Farmhouse (Worcester County, Massachusetts)
Clarkesville Cemetary (Habersham County, Georgia)
Clarkland Farms (Meriwether County, Georgia)
Clarkson House (Meade County, Kentucky)
Clarkson--Knowles Cottage (St. Lawrence County, New York)
Clarksville Iron Furnace (Unicoi County, Tennessee)
Clarksville Methodist Church (Montgomery County, Tennessee)
Claussen House (Florence County, South Carolina)
Clay Hill (Taylor County, Kentucky)
Cleghorn Plantation (Rutherford County, North Carolina)
Clemens House (Madison County, Alabama)
Built by the first cousin of Samuel Clemens, better known as Mark Twain
Clermont Academy (Columbia County, New York)
Clermont Civic Historic District (Columbia County, New York)
Cleveland Hall (Davidson County, Tennessee)
Cliffside (Albemarle County, Virginia)
Clifton House and Mill Site (Franklin County, North Carolina)
Clinton Street Historic District (Philadelphia County, Pennsylvania)
Clinton-Kalamazoo Canal (Unspecified county, Michigan)
Clinton-Kalamazoo Canal (Oakland County, Michigan)
Clover Hill Historic District (Unspecified county, New Jersey)
Cloverden (Middlesex County, Massachusetts)
Clovernook (Hamilton County, Ohio)
Clynchdale (Tazewell County, Virginia)
Coal Run Historic District (Washington County, Ohio)
Cobbham Historic District (Clarke County, Georgia)
Cobble Hill Historic District (Kings County, New York)
Cobblestone Historic District (Orleans County, New York)
Cobblestone Manor (Ontario County, New York)
Cobblestone Street (Cooper County, Missouri)
Cochran Farm (Butler County, Ohio)
Cochran, Jehiel, House (Essex County, Massachusetts)
Cockspur Island Light (Chatham County, Georgia)
Coker Spring (Aiken County, South Carolina)
Col. J. K. Coffey House (Attala County, Mississippi)
Col. Matthew Rogers Building (Menard County, Illinois)
Col. R. T. P. Allen House (Franklin County, Kentucky)
Col. Richard P. Taylor House (Granville County, North Carolina)
Col. Simon Perkins Mansion (Summit County, Ohio)
Col. Thomas Brown House (Preston County, West Virginia)
Col. William Hubbard House (Ashtabula County, Ohio)
Col. William Jones House (Spencer County, Indiana)
Cold Spring Historic District (Putnam County, New York)
Cole Cobblestone Farmhouse (Monroe County, New York)
Cole--Evans House (Hamilton County, Indiana)
A historic location based on Architecture/Engineering and its significance in Architecture
Coley Building (Mobile County, Alabama)
Colgin Hill (Sumter County, Alabama)
College Hill Historic District (Guilford County, North Carolina)
Collina (Claiborne County, Mississippi)
Collins-Marston House (Mobile County, Alabama)
Colonial Theatre (Dauphin County, Pennsylvania)
Columbia House (Washington County, Maine)
Columbia Turnpike East Tollhouse (Columbia County, New York)
Columns, The (Leon County, Florida)
Colvin-Fant-Durham Farm Complex (Chester County, South Carolina)
Historic farm in Chester County, SC
Commandant's Office, Washington Navy Yard (Washington, District of Columbia)
Commandant's Quarters (Wayne County, Michigan)
Commercial Bank and Banker's House (Adams County, Mississippi)
Community Place (Onondaga County, New York)
Concord Hall (Fairfield County, Ohio)
Concord Village Historic District (Jackson County, Michigan)
Concordia Log Cabin College (Perry County, Missouri)
Confederate State Capitol (Hempstead County, Arkansas)
Congregational-Presbyterian Church (Trumbull County, Ohio)
Congress Avenue Historic District (Travis County, Texas)
Conklin-Montgomery House (Wayne County, Indiana)
Conway Center Historic District (Franklin County, Massachusetts)
Cooke-Robertson House (Erie County, Ohio)
Cool Well (Hanover County, Virginia)
Coombs Covered Bridge (Cheshire County, New Hampshire)
Covered bridge over Ashuelot River on Coombs Bridge Road in Winchester
Copeland Whitfield House (Giles County, Tennessee)
Corning-White House (Lake County, Ohio)
Cornwell Farm (Fairfax County, Virginia)
Corwin House (Warren County, Ohio)
Cottage Hill Farm (Portage County, Ohio)
Couch-Artrip House (Mason County, West Virginia)
Courtney House (Shelby County, Kentucky)
Cove Grove (Perquimans County, North Carolina)
Cowdry, Jonas, House (Middlesex County, Massachusetts)
Cowles House (Bibb County, Georgia)
Cox, Isaac, Cobblestone Farmstead (Monroe County, New York)
Crabapple Historic District (Fulton County, Georgia)
Craik-Patton House (Kanawha County, West Virginia)
Crawford County Courthouse (Crawford County, Georgia)
Crawford's Plantation House (Charleston County, South Carolina)
Crawford--Whitehead--Ross House (Jefferson County, Indiana)
Crawford-Talmadge House (Henry County, Georgia)
Creek Council Tree Site (Tulsa County, Oklahoma)
Creekside (Burke County, North Carolina)
Crenshaw House (Gallatin County, Illinois)
Crescent Bend House and Gardens (Knox County, Tennessee)
Cropsey, Jasper F., House and Studio (Westchester County, New York)
Croton Aqueduct, Old (Westchester County, New York)
Crowley House (Berkshire County, Massachusetts)
Crumley-Lynn-Lodge House (Frederick County, Virginia)
Cumberland and Oxford Canal (Cumberland County, Maine)
Cumming Cemetery (Forsyth County, Georgia)
Cunningham-Coleman House (Jefferson County, Georgia)
Curtis, Paul, House (Middlesex County, Massachusetts)
Claimed to be the house named in the poem "Over the River and through the Wood" by Lydia Maria Child
Curtis, William, House (Middlesex County, Massachusetts)
Curtiss House (Columbia County, New York)
Two story Greek Revival brick house built in 1834
Cutter, Gershom, House (Middlesex County, Massachusetts)
Cutter, Jefferson, House (Middlesex County, Massachusetts)
Cutting, Jonas-Kent, Edward, House (Penobscot County, Maine)
Cyrus Butler House (Erie County, Ohio)
Cyrus Felt House (Hancock County, Illinois)
Dade Battlefield Historic Memorial (Sumter County, Florida)
Dahlonega Commercial Historic District (Lumpkin County, Georgia)
Dahlonega Courthouse Gold Museum (Lumpkin County, Georgia)
Dale's Right (Dorchester County, Maryland)
Damon, Washington, House (Middlesex County, Massachusetts)
Dan's Hill (Pittsylvania County, Virginia)
Dana Adobe (San Luis Obispo County, California)
Daniel Boone Hays House (St. Charles County, Missouri)
Daniel Chamberlain House (Tioga County, New York)
Daniel Donnelly House (Washington County, Maryland)
Daniel McCook House (Carroll County, Ohio)
Daniel Munch House (Shenandoah County, Virginia)
Daniel Pratt Historic District (Autauga County, Alabama)
A historic district that includes 140 acres (57 ha) and 154 buildings in Prattville, Alabama.
Daniel Smith Donelson House (Sumner County, Tennessee)
Daniel Supplee Cobblestone Farmhouse (Yates County, New York)
Daniel Thompson and Ryle, John, Houses (Passaic County, New Jersey)
Daniel Webster Law Office and Library (Plymouth County, Massachusetts)
Daniels, Charles, House (Middlesex County, Connecticut)
Darlon Allen House (Lorain County, Ohio)
Davenport Library (Steuben County, New York)
David and Catherine Driver Farm (Rockingham County, Virginia)
David Baldwin House (Bergen County, New Jersey)
David Crabill House (Clark County, Ohio)
David Kittinger Residence (Summit County, Ohio)
David R. Paige House (Lake County, Ohio)
David S. Creigh House (Greenbrier County, West Virginia)
David Stormont House (Muskingum County, Ohio)
David V. Smith House (Salem County, New Jersey)
Davidson-Smitherman House (Bibb County, Alabama)
Built in 1837 by the architect George Howard
Davidsonville Historic District (Anne Arundel County, Maryland)
Davie County Jail (Davie County, North Carolina)
Davis-Edwards House (Walton County, Georgia)
De Tonti Square Historic District (Mobile County, Alabama)
Dean, Abiezar, House (Bristol County, Massachusetts)
Dearing Street Historic District (Clarke County, Georgia)
Decker--Kincaid Homestead (Morris County, New Jersey)
Deerfield Center Historic District (Rockingham County, New Hampshire)
DeFerriere House (Madison County, New York)
Delaware and Raritan Canal (Unspecified county, New Jersey)
Delaware County Courthouse Square District (Delaware County, New York)
Delaware Division of the Pennsylvania Canal (Unspecified county, Pennsylvania)
DeLeon Plaza and Bandstand (Victoria County, Texas)
Denis Julien Inscription (Grand County, Utah)
Denniston House (Grant County, Wisconsin)
Deodatus Royce House (Tioga County, New York)
Dependency on Mulberry Creek (Shelby County, Kentucky)
Des Peres Presbyterian Church (St. Louis County, Missouri)
Dew House (Athens County, Ohio)
Dewberry (Hanover County, Virginia)
Diadatus Keeler House (Delaware County, Ohio)
Dial Mill (Rockdale County, Georgia)