The Colonial Dames of America (CDA) is an American organization comprising women who descend from one or more ancestors who lived in British North America between 1607 and 1775, and who aided the colonies in public office, in military service, or in another acceptable capacity.

The National Headquarters is at Mount Vernon Hotel Museum in New York City, which was purchased by the CDA in 1924.

The organization was founded in 1890, shortly before the founding of two similar societies, The National Society of the Colonial Dames of America and the Daughters of the American Revolution.

In April 1890, Mrs. John King Van Rensselaer (Maria Denning Van Rensselaer), Mrs. John Lyon Gardiner, and Mrs. Archibald Gracie King decided to found a patriotic society of women descended from Colonial ancestry.

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