Charles Hammond House (Aiken County, South Carolina)
Charles Harshman House (Trumbull County, Ohio)
Charles J. and Elsa Schnabel House (Multnomah County, Oregon)
Charles N. Loucks House (Cook County, Illinois)
Charles R. Craig Building (Benton County, Arkansas)
Charles Roessler House (Harris County, Texas)
Chatillon-DeMenil House (St. Louis, Missouri)
Chattanooga Electric Railway (Hamilton County, Tennessee)
Chauvin House (St. James Parish, Louisiana)
Chennault House (Franklin Parish, Louisiana)
Cherry Spring School (Gillespie County, Texas)
Cherrydale Historic District (Arlington County, Virginia)
Chestnut Hill Historic District (Philadelphia County, Pennsylvania)
Cheyenne County Jail (Cheyenne County, Colorado)
Chichizola Family Store Complex (Amador County, California)
China Camp (Marin County, California)
China Grove Roller Mill (Rowan County, North Carolina)
Chipman Potato House (Sussex County, Delaware)
Chipman's Mill (Sussex County, Delaware)
Choptank (New Castle County, Delaware)
Christ Church (Charleston County, South Carolina)
Christ Church (Polk County, Florida)
Christ Church Mission (Yukon-Koyukuk Census Area, Alaska)
Christ Episcopal Church (Bibb County, Georgia)
Christian Royer House (Carroll County, Maryland)
Christian Schlegel Farm (Berks County, Pennsylvania)
Christina Kuhl House (Portage County, Wisconsin)
Mansion now serving as an apartment building
Christopher H. Smith House (Montgomery County, Tennessee)
Christopher Taylor House (Washington County, Tennessee)
Church of the Holy Comforter--Episcopal (Houston County, Minnesota)
Church of the Holy Trinity (Perquimans County, North Carolina)
Cifax Rural Historic District (Bedford County, Virginia)
Cities Service Station (Ottawa County, Oklahoma)
Citizens Bank Building (Payne County, Oklahoma)
Citronelle Railroad Historic District (Mobile County, Alabama)
City Hall (Holt County, Missouri)
City Pier A (New York County, New York)
City Point Community Church (Brevard County, Florida)
Claiborne Kyle Log House (Hays County, Texas)
Clara and Julius Schmidt House (Wabasha County, Minnesota)
Clarence Campbell House (Monroe County, West Virginia)
Clarion County Courthouse and Jail (Clarion County, Pennsylvania)
Clark C. Fowler House (Monroe County, Kentucky)
Clark-Blackwell House (Muscatine County, Iowa)
Beautiful House, High on the Bluff, Overlooking the Mississippi River
Clark-Pratt House (Kent County, Delaware)
Clarke County Jail (Clarke County, Georgia)
Clarksburg School (Montgomery County, Maryland)
Clarksville Foundry and Machine Works Office (Montgomery County, Tennessee)
Clay County Courthouse (Clay County, Tennessee)
Claymont Hill (Wilkes County, North Carolina)
Clear Springs Plantation (Craven County, North Carolina)
Clear Springs Tabernacle (Clark County, Arkansas)
Cleveland School (Johnston County, North Carolina)
Cleveland Street District (Durham County, North Carolina)
Cliffs, The (Philadelphia County, Pennsylvania)
Clifton (Albemarle County, Virginia)
Clifton (Culpeper County, Virginia)
Clifton Place (Maury County, Tennessee)
Clinton Avenue Historic District (Ulster County, New York)
Now part of the Kingston Stockade District
Clore House (Boone County, Kentucky)
Cloud House (Fayette County, Kentucky)
Cloyd Hotel (Macon County, Tennessee)
Club Casa Del Mar (Los Angeles County, California)
Coal Creek Library (Douglas County, Kansas)
Coan Baptist Church (Northumberland County, Virginia)
Cobb Building (Wagoner County, Oklahoma)
Cockram Mill (Patrick County, Virginia)
Coffee County Courthouse (Coffee County, Tennessee)
Col. James Blood House (Douglas County, Kansas)
This early Victorian two-story red brick house is located at 1015 Tennessee Street.
Col. John Dewberry House (Smith County, Texas)
Col. John Work House (Franklin County, Pennsylvania)
Col. Joseph Young Block (Scott County, Iowa)
Cold Springs School (Marion County, Arkansas)
Coldwater Creek Covered Bridge (Calhoun County, Alabama)
Multiple Kingpost through truss bridge over inlet to Oxford Lake on Trail in Oxford
Colfax Passenger Depot (Placer County, California)
College Block Building (Johnson County, Iowa)
Collins Potato House (Sussex County, Delaware)
Columbine (Routt County, Colorado)
Comal Hotel and Klein-Kuse House (Comal County, Texas)
Community Building (Rowan County, North Carolina)
Community Theater (Phelps County, Missouri)
Theater used for live shows and movies. Currently presenting live theater.
Comstock-Harris House (Orange County, Florida)
Conestoga Cork Works Building (Lancaster County, Pennsylvania)
Confederate Memorial Chapel (Richmond, Virginia)
Conoho Creek Historic District (Martin County, North Carolina)
Contentment (Rockingham County, Virginia)
Continental Stove Works (Montgomery County, Pennsylvania)
Cool Spring Battlefield (Clarke County, Virginia)
Cool Spring Place (Cumberland County, North Carolina)
Cooleemee (Davie County, North Carolina)
Coombs Covered Bridge (Cheshire County, New Hampshire)
Covered bridge over Ashuelot River on Coombs Bridge Road in Winchester
Cooper School (Alamance County, North Carolina)
Coor-Gaston House (Craven County, North Carolina)
Copeland Whitfield House (Giles County, Tennessee)
Corcoran Hall (Washington, District of Columbia)
Corralitos Ranch (Zapata County, Texas)
Corwin Council House and Jail (Warren County, Ohio)
Cottage Grove Historic District (Nelson County, Kentucky)
Cotton Storage House (Haskell County, Oklahoma)
Coughanour Apartment Block (Payette County, Idaho)
Coulterville Main Street Historic District (Mariposa County, California)
Council Ranger Station (Adams County, Idaho)
Counts Hotel (Macon County, Tennessee)
Courthouse Square Historic District (Grant County, Wisconsin)
Cove Presbyterian Church (Albemarle County, Virginia)
Cove, The (Halifax County, Virginia)
Cox-Ange House (Pitt County, North Carolina)
Crabapple School (Gillespie County, Texas)
Craig--Beasley House (Williamson County, Tennessee)
Cranor School (Hopkins County, Kentucky)
Crawford Covered Bridge (Washington County, Pennsylvania)
Covered bridge over Robinson Fork on Crawford Road
Crawfordville Historic District (Taliaferro County, Georgia)
Cray House (Queen Anne's County, Maryland)
Crimora School (Augusta County, Virginia)
Crockett Springs Cottage (Montgomery County, Virginia)
Crockett's Cove Presbyterian Church (Wythe County, Virginia)
Cromer House (Montgomery County, Virginia)
Cronkhite Ranch House (Blaine County, Oklahoma)
Crooked Run Valley Rural Historic District (Fauquier County, Virginia)
Crossroads Fire Tower (Ashley County, Arkansas)
Crossroads Tavern (Albemarle County, Virginia)
Crosswicks (Burlington County, New Jersey)
Crow Hill (Columbia County, New York)
Crow House (Lincoln County, Arkansas)
Crump's Mill and Millpond (New Kent County, Virginia)
Cumberland County Courthouse (Cumberland County, Virginia)
Cumberland County Courthouses (Cumberland County, Tennessee)
Cumberland Presbyterian Church (Lafayette County, Missouri)
Cunningham--Maier House (Scioto County, Ohio)
Curtis Hardware Store (Delta County, Colorado)
Cypress Methodist Camp Ground (Dorchester County, South Carolina)
Cyrus McCormick Farm and Workshop (Rockbridge County, Virginia)
Dabney-Thompson House (Charlottesville, Virginia)
Dagen's Grocery (LaMoure County, North Dakota)
Danbury Historic District (Stokes County, North Carolina)
Daniel Donnelly House (Washington County, Maryland)
Daniel P. Foust House (Guilford County, North Carolina)
Daniel S. Major House (Dearborn County, Indiana)
Daniel Waggoner Log House and Barn (Centre County, Pennsylvania)
Danley Covered Bridge (Washington County, Pennsylvania)
Covered bridge over Robinson Fork on Dogwood Hill Road (TR 379)
Danske Evangelist Lutheran Kirke (Lincoln County, Kansas)
Darby House, The (Hopkins County, Kentucky)
Dardeau Building (Evangeline Parish, Louisiana)
Dau-Webbenhorst Barn (Twin Falls County, Idaho)
David Burton House (Shelby County, Kentucky)
David McKenzie Log Cabin (Johnson County, Kentucky)
Davidson-Smitherman House (Bibb County, Alabama)
Built in 1837 by the architect George Howard
Davie County Jail (Davie County, North Carolina)
Davies House (Berks County, Pennsylvania)
Davis Barn (Stone County, Arkansas)
Davis Eastburn Farm (New Castle County, Delaware)
Davis Town Meeting House (Suffolk County, New York)
Davis--Beard House (Prince William County, Virginia)
Dawson-Vanderhorst House (Aiken County, South Carolina)
Day Covered Bridge (Washington County, Pennsylvania)
Decatur Methodist Church (Meigs County, Tennessee)
Deep River-Columbia Manufacturing Company (Randolph County, North Carolina)
DeFuniak Springs Historic District (Walton County, Florida)
Dekalb County Fairgrounds (De Kalb County, Tennessee)
Delaphane Historic District (Fauquier County, Virginia)
Delaware City Historic District (New Castle County, Delaware)
Delgrado School (New Hanover County, North Carolina)
Dellet Plantation (Monroe County, Alabama)
A plantation and historic district in the ghost town of Claiborne, Monroe County, Alabama.
Denver Downs Farmstead (Anderson County, South Carolina)
Historic farm near Anderson, SC
Depot Square Historic District (Orange County, Vermont)
Deslattes House (Livingston Parish, Louisiana)
Devil's Den, McClurg Covered Bridge (Washington County, Pennsylvania)
Dial Mill (Rockdale County, Georgia)
Dickinson County Courthouse and Jail (Dickinson County, Michigan)
Dickinson-Milbourn House (Lee County, Virginia)
Dilday Mill (Dade County, Missouri)
District No. 20 School (Goodhue County, Minnesota)
Division of St. John Historic District (St. Tammany Parish, Louisiana)
Doan's Adobe House (Wilbarger County, Texas)
Dockery Farms Historic District (Sunflower County, Mississippi)
Dog Creek School (Le Flore County, Oklahoma)
Donald Barger House (Boone County, Kentucky)
Donaldsonville Historic District (Ascension Parish, Louisiana)
Donelson House (Bolivar County, Mississippi)
Donoho Hotel Historic District (Macon County, Tennessee)
Dorn's Flour and Grist Mill (McCormick County, South Carolina)
Historic mill in McCormick, SC
Dorsey Beeler House (Larue County, Kentucky)
Doub's Mill Historic District (Washington County, Maryland)
Dow Grain Company Elevator (Kingfisher County, Oklahoma)
Downtown Abbeville Historic District (Vermilion Parish, Louisiana)
Downtown Brookhaven Historic District (Lincoln County, Mississippi)
Downtown Greensburg Historic District (Green County, Kentucky)
Downtown Smithfield Historic District (Johnston County, North Carolina)
Dr. Alexander C. Brabson House (Macon County, North Carolina)
Dr. Arch Jordan House (Orange County, North Carolina)
Dr. Beauregard Martin Brooks House (Decatur County, Tennessee)