Alney Island is an island in the River Severn near Gloucester. The Severn splits into two channels (known as East Channel and West Channel) at Upper Parting (the northernmost tip of Alney), and merges again at Lower Parting to the south. The island is a strip of land in between the two channels, about 2.1 mi or 3.5 km long (roughly north-to-south) and 0.74 mi or 1.2 km wide at its widest (east-to-west). It is a local Nature Reserve.