King's County was a federal electoral district in Prince Edward Island, Canada, that was represented in the House of Commons of Canada from 1873 to 1896.

This riding was created in 1873 when Prince Edward Island joined the Canadian Confederation.

It was abolished in 1892 when it was redistributed into East Queen's and King's ridings.

As a result of Prince Edward Island joining Confederation 1 July 1873

Mr. Robertson was declared not duly elected on the grounds that he was a member of the Prince Edward Island Legislative Assembly at the time of the election.