麦肯赛特王国（Magonsæte）是麦西亚王国的一个较小的次王国，它毗邻赫里福德教区。

656年，Pengwern的布立吞人领地被诺森布里亚的奥斯威征服，当时他是麦西亚王国的宗主。随后，西Pengwern也被一群生活在罗马古镇Magnis（或Caer Magon，现在的Kenchester，靠近赫里福德）的盎格鲁人占领。

Western Hecani次王国存在于7世纪后期和8世纪早期，已知的三个统治者是：Merewalh、Mildfrith和Merchelm。8世纪后期，这一地区似乎已被并入麦西亚并被称作Westerna。到了9世纪，这一地区开始被称作麦肯赛特。

Magonsæte was a minor sub-kingdom of the greater Anglo-Saxon kingdom of Mercia, thought to be coterminous with the Diocese of Hereford.

The British territory of Pengwern was conquered by Oswiu of Northumbria in 656, while he was overlord of the Mercians. Western Pengwern was then occupied by Anglian groups. One group based itself at the old Roman town of Magnae or (Old Welsh) Cair Magon, modern Kenchester near Hereford.