Clyde Carter House (Colbert County, Alabama)
Clyde H. Ray Sr., House (Haywood County, North Carolina)
Clyde Hotel (Multnomah County, Oregon)
Clyde School (Cloud County, Kansas)
Clyde Wilkinson House (Custer County, Idaho)
Clymer House (Cheshire County, New Hampshire)
Cnopius House (Sonoma County, California)
Co-Op Block and J. N. Ireland Bank (Oneida County, Idaho)
Coalmont Bank Building (Grundy County, Tennessee)
Coalport Historic District (Clearfield County, Pennsylvania)
Coan Baptist Church (Northumberland County, Virginia)
Coan House (Olmsted County, Minnesota)
Coates House Hotel (Jackson County, Missouri)
Coatesville Historic District (Chester County, Pennsylvania)
Coateswood (Newberry County, South Carolina)
Coats House (Edgecombe County, North Carolina)
Cobb Building (Wagoner County, Oklahoma)
Cobb Building (King County, Washington)
Cobb-Treanor House (Clarke County, Georgia)
Cobbham Historic District (Clarke County, Georgia)
Cobble Hill Historic District (Kings County, New York)
Cobblestone House (Steuben County, New York)
Cobblestone Railroad Pumphouse (Ontario County, New York)
Cobbs Creek Automobile Suburb Historic District (Philadelphia County, Pennsylvania)
Cobbs Hall (Northumberland County, Virginia)
Cobham Park (Unspecified county, Virginia)
Cobleskill Historic District (Schoharie County, New York)
Coburg Historic District (Lane County, Oregon)
Coburn, John G. (Franklin County, Maine)
Coca Cola Company Building (Cook County, Illinois)
Coca-Cola Bottling Company Building (Boone County, Missouri)
Coca-Cola Bottling Company Building (Adams County, Illinois)
Coca-Cola Bottling Company Plant (Monroe County, Indiana)
Coca-Cola Bottling Corporation (Hamilton County, Ohio)
Coca-Cola Bottling Plant-Athens (Clarke County, Georgia)
Coca-Cola Building (Conway County, Arkansas)
Coca-Cola Building (Jackson County, Missouri)
Noted KC landmark, now serving in residential service
Coca-Cola Building Annex (Fulton County, Georgia)
Coca-Cola Plant (Shelby County, Kentucky)
Coca-Cola Syrup Plant (St. Louis, Missouri)
Cocanougher House (Washington County, Kentucky)
Cochran Farm (Butler County, Ohio)
Cochran Grange (New Castle County, Delaware)
Cochran Municipal Building and School (Bleckley County, Georgia)
Cochran, Jehiel, House (Essex County, Massachusetts)
Cochran--Cassanova House (Jackson County, Mississippi)
Cochran-Helton-Lindley House (Monroe County, Indiana)
Cock--Cornelius House (Nassau County, New York)
Cocke County Courthouse (Cocke County, Tennessee)
Cocke County Memorial Building (Cocke County, Tennessee)
Cocke--Martin--Jackson House (Rankin County, Mississippi)
Cockerill House (Adams County, Ohio)
Coddington School (Norfolk County, Massachusetts)
Codman Building (Suffolk County, Massachusetts)
Codman Square District (Suffolk County, Massachusetts)
Codman-Davis House (Washington, District of Columbia)
Coeur d'Alene City Hall (Kootenai County, Idaho)
Coeur d'Alene Federal Building (Kootenai County, Idaho)
Coeur d'Alene Masonic Temple (Kootenai County, Idaho)
Coeymans School (Albany County, New York)
Coffee County Courthouse (Coffee County, Alabama)
Coffee County Courthouse (Coffee County, Tennessee)
Coffee High School (Lauderdale County, Alabama)
Coffee Run Mission Site (New Castle County, Delaware)
Coffeetown Grist Mill (Northampton County, Pennsylvania)
Coffin Point Plantation Caretaker's House (Beaufort County, South Carolina)
Coffin's Grove Stagecoach House (Delaware County, Iowa)
Coffin, Jethro, House (Nantucket County, Massachusetts)
Coffin, Stephen, House (Lincoln County, Maine)
Coffing, John C., House (Litchfield County, Connecticut)
Cogswell's Grant (Essex County, Massachusetts)
Cogswell, Edward, House (New London County, Connecticut)
Cohannet Mill No. 3 (Bristol County, Massachusetts)
Cohasset (Hampton County, South Carolina)
Cohasset Central Cemetery (Norfolk County, Massachusetts)
Cohen House (Petersburg, Virginia)
Coiner House (Augusta County, Virginia)
Coiner-Quesenbery House (Waynesboro, Virginia)
Coit Street Historic District (New London County, Connecticut)
Coke Ovens (Pierce County, Washington)
Coker Spring (Aiken County, South Carolina)
Cokesbury Church (Accomack County, Virginia)
Col Alto (Lexington, Virginia)
Col. Abner Gaines House (Boone County, Kentucky)
Col. Alfred E. Lewis House (Jackson County, Mississippi)
Col. Charles C. Flowerree House (Warren County, Mississippi)
Col. Charles Young House (Greene County, Ohio)
Col. E. M. Heigho House (Adams County, Idaho)
Col. Edmund Pendleton House (Clark County, Kentucky)
Col. Edward N. Kirk House (Whiteside County, Illinois)
Col. Elias Earle Historic District (Greenville County, South Carolina)
Col. Francis Dancy House (Morgan County, Alabama)
Oldest building in Decatur and one of four antebellum houses in Decatur to survive
Col. Gideon Morgan House (Roane County, Tennessee)
Col. Green G. Mobley House (Sumter County, Alabama)
Col. Gustavus A. Palmer House (McHenry County, Illinois)
Col. Henry Hewitt Wood House (Kanawha County, West Virginia)
Col. Hugh B. and Helen Moore House (Galveston County, Texas)
Col. Ira C. Copley Mansion (Kane County, Illinois)
Col. Isaac Beeson House (Guilford County, North Carolina)
Col. Isaac G. Reed House (Lincoln County, Maine)
Lost to fire April 2, 2017
Col. J. A. Banks House (Calhoun County, South Carolina)
Col. J. Hinckley House (Genesee County, Michigan)
Col. J. K. Coffey House (Attala County, Mississippi)
Col. Jacob Lott Ludlow House (Forsyth County, North Carolina)
Col. Jacob Yoes Building (Crawford County, Arkansas)
Col. James Blood House (Douglas County, Kansas)
This early Victorian two-story red brick house is located at 1015 Tennessee Street.
Col. James Cameron House (Northumberland County, Pennsylvania)
Col. James Loomis House (Hartford County, Connecticut)
Col. John Bowman House (Mercer County, Kentucky)
Col. John Dewberry House (Smith County, Texas)
Col. John Harris House (Jackson County, Missouri)
Col. John Streett House (Harford County, Maryland)
Col. John Van Cleve Homestead (Mercer County, New Jersey)
Col. John Weir House (Choctaw County, Mississippi)
Col. John Williams House (Knox County, Tennessee)
Col. John Work House (Franklin County, Pennsylvania)
Col. Joseph Barker House (Washington County, Ohio)
Col. Joseph Young Block (Scott County, Iowa)
Col. Matthew Rogers Building (Menard County, Illinois)
Col. O. R. Hood House (Etowah County, Alabama)
Col. Olin M. Dantzler House (Calhoun County, South Carolina)
Col. R. T. P. Allen House (Franklin County, Kentucky)
Col. Ralph Andrews House (White County, Arkansas)
Col. Randolph C. Doom House (Jasper County, Texas)
Col. Richard P. Taylor House (Granville County, North Carolina)
Col. Robert Z. Taylor House (Gibson County, Tennessee)
Col. Samuel W. Peel House (Benton County, Arkansas)
Col. Silas Alexander Sharpe House (Iredell County, North Carolina)
Col. Simeon Deming House (Washington County, Ohio)
Col. Thomas C. Love House (Webster County, Missouri)
Col. Thomas Deye Owings House (Bath County, Kentucky)
Col. William H. Fulkerson Farmstead (Jersey County, Illinois)
Col. William H. Robinson House (Traill County, North Dakota)
Col. William H. Silsby House (Jackson County, Oregon)
Col. William Henderson French House (Mercer County, West Virginia)
Col. William Hubbard House (Ashtabula County, Ohio)
Col. William James Willing House (Copiah County, Mississippi)
Col. William Jones House (Spencer County, Indiana)
Col. William T. Roberts House (Douglas County, Georgia)
Col. Young House (Benton County, Arkansas)
Colbert Historic District (Madison County, Georgia)
Colbert House (Pacific County, Washington)
Colbert School (Madison County, Georgia)
Colburn House (Gallatin County, Montana)
Colburn House State Historic Site (Kennebec County, Maine)
Colburn Park Historic District (Grafton County, New Hampshire)
Colburn School (Kennebec County, Maine)
Colburn School (Middlesex County, Massachusetts)
Colburn School--High Street Historic District (Norfolk County, Massachusetts)
Colburn T. Winslow House (Stevens County, Washington)
Colby Community High School (Thomas County, Kansas)
Colchester Apartments (St. Louis, Missouri)
Colchester Village Historic District (New London County, Connecticut)
Colcord Farmstead (Kennebec County, Maine)
Cold Harbor National Cemetery (Hanover County, Virginia)
Cold Spring Farm (Fulton County, Pennsylvania)
Cold Spring Farm (Sagadahoc County, Maine)
Cold Spring Grange Hall (Cape May County, New Jersey)
Cold Spring Harbor Library (former) (Suffolk County, New York)
Cold Spring Historic District (Putnam County, New York)
Cold Spring Park Historic District (Henderson County, North Carolina)
Cold Spring Presbyterian Church (Cape May County, New Jersey)
Colden Mansion Ruins (Orange County, New York)
Colding-Walker House (Allendale County, South Carolina)
Coldwater Catholic Church Complex (Mercer County, Ohio)
Coldwater Downtown Historic District (Branch County, Michigan)
Cole Hotel (Cass County, North Dakota)
Cole House (Bear Lake County, Idaho)
Cole Motor Car Company (Marion County, Indiana)
Cole Neighborhood Historic District (Denver County, Colorado)
Cole Town District (Coweta County, Georgia)
Cole Watch Tower (Winnebago County, Wisconsin)
Seven story brick over steel tower built on an 1870 house
Cole's Five Cypress Farm (San Joaquin County, California)
Cole, Benjamin, House (Bristol County, Massachusetts)
Cole--Evans House (Hamilton County, Indiana)
A historic location based on Architecture/Engineering and its significance in Architecture
Cole--Hasbrouck Farm Historic District (Ulster County, New York)
Cole--Hipp House (Ellis County, Texas)
Cole-Hatcher-Hampton Wholesale Grocers (Muscogee County, Georgia)
Colebrook Center Historic District (Litchfield County, Connecticut)
Coleman Hall (Howard County, Missouri)
Coleman Hardware Company Building (Grundy County, Illinois)
Coleman Theatre (Ottawa County, Oklahoma)
Coleman, House (Trimble County, Kentucky)
Coleman--Desha Plantation (Harrison County, Kentucky)
Coleman--Scott House (Multnomah County, Oregon)
Coleman-Furlong House (Jefferson County, Washington)
Coleman-White House (Warren County, North Carolina)
Colerain Forges Mansion (Huntingdon County, Pennsylvania)
Coleraine Carnegie Library (Itasca County, Minnesota)
Coleraine City Hall (Itasca County, Minnesota)