The Hutt Valley is the large area of fairly flat land in the Hutt River valley in the Wellington region of New Zealand. Like the river that flows through it, it takes its name from Sir William Hutt, a director of the New Zealand Company in early colonial New Zealand.
The river flows roughly along the course of an active geologic fault, which continues to the south to become the main instrument responsible for the uplift of the South Island's Southern Alps. For this reason, the land rises abruptly to the west of the river; to the east two floodplains have developed. The higher of these is between 15 and 22 km from the mouth of the river. Beyond this, the river is briefly confined by a steep-sided gorge near Taita (pronounced "tie-tah"), before the land opens up into a long triangular plain close to the outflow into Wellington Harbour.