Cotswold Canals Trust

Restoring the Stroudwater Navigation and Thames & Severn Canal in England.

Cottage Grove Genealogical Society

Oregon.

Cottingley Village History Society

Yorkshire, U.K.

Cottonwood County Historical Society

Windom, Minnesota.

Council of Hellenes Abroad (SAE) - North & South America

Council of Scottish Clans and Associations' (COSCA)

Council of Volusia County Genealogical Societies

Consisting of representatives from Halifax Genealogical Society, Genealogical Society of Southeast Volusia County, Volusia Genealogy Society, Roots and Branches Genealogical Society & the Volusia Computer Genealogy Group.

County Roscommon Family History Society

Ireland.
[The original link is broken. This link points to an archived copy on the Wayback Machine]

County Tipperary Historical Society / Cumann Staire Chontae Thiobraid çrann

Ireland.

cousinjack.org: The Cornish American Heritage Society

Their mission is to promote and preserve the heritage of Cornish settlers.

Coventry Family History Society

Cow Neck Peninsula Historical Society

Port Washington, New York.

Coweta County Genealogical Society

Historical and genealogical research library, Grantville, Georgia.

Cowra Family History

New South Wales, Australia.

Craftsbury Historical Society

Craftsbury, Vermont.

Craigavon Historical Society

County Armagh, Northern Ireland.
[The original link is broken. This link points to an archived copy on the Wayback Machine]

Craigieburn Historical Interest Group

A website on the subject of the history and genealogy of the community and surrounding area of Craigieburn in the northern suburbs of Melbourne, Victoria, Australia. The aim is to collect, preserve and manage historical and genealogical assets for the community and surrounding area of Craigieburn, Melbourne, Victoria, Australia.

Cranberry Genealogy Club

Butler County, Pennsylvania.

Cranford Historical Society

New Jersey.

Crater Lake Chapter, Oregon State Society Daughters of the American Revolution

Medford, Oregon.