Colyers Hanger is a Site of Special Scientific Interest in Surrey, England, close to the village of Chilworth, Surrey.
Colyers Hanger lies on the south-facing escarpment of the Greensand Ridge, which at this point forms St. Martha's Hill. It includes Ancient Woodland habitats on the steeper slopes, and an area of heathland habitats on more level land above these.
Colyers Hanger SSSI is a Nature Conservation Review site.
Coordinates: 51°13′30″N 0°31′05″W / 51.225°N 0.518°W