or HEYDON, a borough town of Holderness, in the east riding of Yorkshire, situated on a creek connected with the river Humber. It is governed by a mayor and aldermen; and returned two members to parliament till the disfranchisement of 1832. The inhabitants amounted in 1801 to 592, in 1811 to 780, in 1821 to 902, and in 1831 to 1080.