Henry Plantagenet Somerset was a pioneer pastoralist and politician in Queensland, Australia. Somerset was a liberal politician who represented the district of Stanley in the Queensland Legislative Assembly from 1904 to 1920, and canvassed successfully for the extension of the Brisbane Valley railway through the Brisbane River Valley to the rich timber reserves in the Blackbutt Range and beyond. Both the Somerset Dam and the local government area of Somerset Region are named in his honour.

The Somerset Region is a local government area located in the West Moreton region of South East Queensland, Australia, about 100 kilometres (62 mi) northwest of Brisbane and centred on the town of Esk. It was created in 2008 from a merger of the Shire of Esk and the Shire of Kilcoy. It is commonly known as the Brisbane Valley, due to the Brisbane River which courses through the region, although significant parts of the region lie outside the hydrological Brisbane Valley itself.