A hamlet in Bowerchalke parish, south-west Wiltshire, England (OS grid ref SU0122).
A community (without a council) in Cardiff, Wales; it includes Cardiff Castle.
A community (without a council) in Swansea, Wales; it includes Swansea Castle.
A town in Okfuskee County, Oklahoma, United States, derived from the surname.
Castle class, a class of steam locomotives used on the GWR
A surname transferred from the common noun referring to someone who lived in or worked in a castle
University College, Durham, a constituent college located in Durham Castle
A hamlet near Threlkeld, Eden district, Cumbria, England (OS grid ref NY3325).