Henry Nicol Blackadar (1803 – November 22, 1852) was a lawyer and political figure in Nova Scotia Canada. He represented Pictou County from 1840 to 1843 and Pictou township from 1845 to 1851 in the Nova Scotia House of Assembly.
- A Directory of the Members of the Legislative Assembly of Nova Scotia, 1758-1958, Public Archives of Nova Scotia (1958)
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