Australia

• Castle Hill, a small hill and land area in Bicton, Western Australia
• Castle Hill, New South Wales, a suburb of Sydney
• Castle Hill, Queensland, a suburb of Townsville
  • Castle Hill, Townsville, a granite monolith

United Kingdom

England

• Castle Hill, Brighton, a Site of Special Scientific Interest near Brighton, East Sussex
• Castle Hill, Cambridge, a hill and street in Cambridge
• Castle Hill, Chessington, a Local Nature Reserve in London
• Castle Hill, Dudley Castle, West Midlands
• Castle Hill, Englefield Green, Surrey
• Castle Hill, Filleigh, a privately owned Palladian House in North Devon
• Castle Hill, Folkestone, a hill on the North Downs near Folkestone, Kent
• Castle Hill, Hampshire, Iron Age fortification the New Forest in Hampshire
• Castle Hill, Huddersfield, in the county of West Yorkshire in England
• Castle Hill, Malvern Hills, in the parish of Wichenford
• Castle Hill, Mere, in Wiltshire, England
• Castle Hill, Oxfordshire, part of Wittenham Clumps
• Castle Hill, Rattray, Devon
• Castle Hill, Stockport, Greater Manchester
• Castle Hill, Ipswich, Suffolk, an area of Ipswich
  • Castle Hill Ward, Ipswich
• Great Ashfield Castle, Suffolk, England
• Castle Hill, Thetford, an earthwork fortification in Thetford, Norfolk
• Castle Hill, Torrington, Iron Age earthworks and hill fort in Devon
• Castle Hill, Winchester, Council Chamber for Hampshire County Council
• Castle Hill, Wolverley, Worcestershire

Scotland

• Castle Hill, Caprington, East Ayrshire.
• Castlehill, Dumbarton, in Scotland
• Castlehill, Edinburgh
• Castlehill, Perth and Kinross, a location
• Castlehill, South Ayrshire, a location
• Castlehill, Scottish Borders, a location
• Castlehill Fort, the Roman Fort on the Antonine Wall in Scotland, near Bearsden

Wales

• Castle Hill, Ceredigion

Ireland

• Castle Hill, Kerry, 600 m peak in Slieve Mish Mountains
• Castlehill, County Mayo, a village in County Mayo, Ireland

United States

• Castle Hill (Sitka, Alaska), an archaeological site
• Castle Hill, California, a census-designated place
• Castle Hill, Maine, a town in Aroostook County
• Castle Hill (Ipswich, Massachusetts), a historic house
• Castle Hill, Bronx, New York, a neighborhood in New York City
• Castle Hill Light, Newport, Rhode Island, a historic lighthouse and inn
• Castle Hill (Virginia), a historic plantation in Albemarle County
• Castle Hills, Texas, a small city in Bexar County

Other countries

• Castle Hill, Newfoundland and Labrador, Canada
• Castle Hill (Buda), the oldest part of the Hungarian capital
• Castle Hill, New Zealand
• Castle Hill (Vilnius), Lithuania
• Castle Hill, Ljubljana, Slovenia, the location of the Ljubljana Castle
• Linnanmäki (Castle Hill), an amusement park in Helsinki, Finland
• Zamkova Hora (Kyiv) (Castle Hill), Kyiv, Ukraine