- CAE Lecturers Association (1975 - 1994), Teachers Federation
- CAE, College of Advanced Education Lecturers' Association, Wollongong Branch (1975 - 1994)
- Caledonian Collieries Ltd
- Cambo Cambo Station
- Camden Branch, Australian Labor Party (1963 - 1974)
- Cameron Family
- Cameron, B.L.
- Campbell Family
- Campbell, Archibald (c. 1890 - c. 1920)
- Campbell's Pharmacy (1921 - 1985)
- Canonbar Station
- Cantilena Singers
- Cardiff Locomotive Workshops Combined Unions Shop Committee (1937 - 1979)
- Caringbah Branch, Australian Labor Party (1953 - 1963)
- Carlton, Maria
- Carpenter, Harry W.
- Carr, Florence
- Casey, J.B
- Casey, Michael
- Casey, Paul J.
- Casino School of Arts
- Cavanagh, Albert
- Central Coast and Hunter Region Branch, Library Association of Australia (1952 - 1983)
- Central Riverina National Football League
- Central Wagga, Lions International
- Centre for Rural Social Research
- Cessnock District Co-operative Society Limited
- Cessnock No.1 Colliery
- Cessnock Potteries Ltd
- CFMEU, Construction Forestry Mining and Energy Union
- Chadwick, Doris (c. 1890 - c. 1960)
- Chaffey, William Adolphus (1915 - 1987)
- Chamber of Manufacturers of New South Wales, Newcastle Branch
- Chamber of Manufacturers of New South Wales (1912 - 1968)
- Charles A. Zoli Enterprises
- Charles Sturt University - Bathurst, Mitchell Academics' Union
- Charles Sturt University, - Rivcoll Union
- see Rivcoll Union
- Charles Sturt University (1989 - )
- Charles Sturt University Medical Centre
- see Osmond-French Medical Centre
- Charles Sturt University, Rivcoll Union
- Chas Hardy & Co (1862 - 1924)
- Chessbrough, Dorris
- Chessbrough, Sue
- Chevy Chase (1905 - )
- Christ Church Cathedral (c. 1826 - )
- Church of England, Armidale
- Church of England, St Mary's Parish
- Church of England, St Peter's Parish
- Church of England Men's Society
- Churches of Northern New South Wales
- Clarence River
- Clarence River Historical Society
- Clark Family
- Clark, Mortimer Carr
- Clark, Thomas Philip (1825 - 1886)
- Clarke, William Branwhite (1798 - 1878)
- Clark's Store
- Cleghorn Motors
- Cleghorn, William (1833 - 1896)
- Cleghorn, William Garibaldi (c. 1860 - c. 1943)
- Clerkness Station (1836 - )
- Clothing and Allied Trades Union of Australia (1875 - 1975)
- Clyde, Laurel Anne
- Coastal Farmers Co-operative Dairy
- Cobbadah Hotel
- Cochrane Family
- Cochrane, Christina Mary (1904 - )
- Cochrane, Percival Neville (1907 - )
- Cochrane, Renata (nee Campbell-Rogers) (1919 - 1983)
- Cocking, Josiah (1867 - 1960)
- Cocks, Samuel
- Coffs Harbour (1861 - )
- Coffs Harbour Advocate [Newspaper]
- Coffs Harbour and Dorrigo Advocate [Newspaper]
- Coffs Harbour School of Arts
- Cole, Stan (1920 - )
- College of Advanced Education Lecturers' Association, Wollongong Branch (1975 - 1994), CAE
- Colliery Employees Federation of the Northern District NSW Industrial Union of Employees (1906 - 1915)
- Colly Creek Station
- Columbus Family
- Combaning Siding Public School Parents & Citizens' Association
- Comerford, Jim
- Communist Party of Australia
- Communist Party Publications, SEARCH Foundation (1920 - 1984)
- Community Radio - 2VOX-FM (1983 - 1989)
- Como Jannali Branch, Australian Labor Party (1930 - 1992)
- Condon Family
- Connor, Reginald Francis Xavier "Rex" (1907 - 1977)
- Connors, John
- Construction Forestry Mining and Energy Union, CFMEU
- Cook, Brian D. (1938 - )
- Coolamon Circuit Methodist Church
- Coolamon Evening Branch, Country Women's Association (1977 - 1992)
- Coolamon Mothers' Union, St. Andrew's Parish, Anglican Diocese of Riverina
- Coolamon Parish, Anglican Diocese of Riverina
- Coolamon Presbyterian Church
- Coolamon Uniting Church
- Coolamon-Ganmain Hospital
- Coolamon-Ganmain Joint Methodist/Presbyterian Church
- Coonamble District Pastoral Stations
- Cooper, Muriel Leeuwin (1893 - 1987)
- Cooper, W.T.
- Cooringoora Station
- Cootamundra Hospital
- Coraki Debating Society
- Coraki School of Arts
- Corowa Parish, Anglican Diocese of Riverina
- Corrimal Branch, Australian Labor Party (1961 - 1973)
- Corrimal War Memorial Olympic Pool Committee (1962 - 1974)
- Cory Family
- Country Public Libraries' Association of New South Wales
- Country Rugby Union of NSW Referees' Association
- Country Women's Association, Riverina Group
- Country Women's Association, Riverina Group - Younger Set
- Country Women's Association, Wagga Wagga Branch
- Country Women's Association (1935 - 1956), Euberta Branch
- Country Women's Association (1935 - 1956), Harefield Branch
- Country Women's Association (1947 - ), The Rock Branch
- Country Women's Association (1948 - 1992), Wantabadgery Branch
- Country Women's Association (1950 - ), Oura Branch
- Country Women's Association (1959 - ), Junee Reefs
- Country Women's Association (1977 - 1992), Coolamon Evening Branch
- Country Women's Association (c. 1932 - ), Tarcutta Branch
- Courtauld's Hilton
- Cousins, Arthur (1866 - )
- Cowabbie West Public School Parents & Citizens' Association
- Cox Family
- Craig, Richard (c. 1812 - 1855)
- Crawford Family
- Croft, Matthew Hugh Fiennes (1874 - 1954), Grazier
- Crowley Family
- Crystal Cordial Co
- Culcairn - Henty Parish, Anglican Diocese of Riverina
- Cuninghame, Robert
- Cunningham, Allan (1791 - 1839)
- Curran, Dennis
- Currawarna Public Hall Trustees
- Currawarna Public School Parents & Citizens' Association
- Currawarna Union Church
- Cutters & Trimmers Union of NSW (c. 1890 - c. 1917)
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