Castle Rock may refer to:

• Castle Rock (Alaska), an island off the coast of the U.S. state of Alaska
• Castle Rock, Hong Kong, an island of Hong Kong, part of the Po Toi Islands
• Castle Rock (Massachusetts), an island in the U.S. state of Massachusetts

• Castle Rock (Antarctica), near McMurdo Station, Antarctica
• Castle Rock (South Shetland Islands), Antarctica
• Castle Rock, Western Australia, in the Porongurup Range, Australia
• Castle Rock (volcano), a volcanic plug in British Columbia, Canada
• Castle Rock (Waikato), a volcanic plug on the Coromandel Peninsula, New Zealand
• Te Tihi-o-Kahukura / Castle Rock, a rock outcrop in the Port Hills
• Castle Rock (Edinburgh), the site of Edinburgh Castle, Scotland, U.K.
• Castle Rock (Table Mountain), a rock formation of the Table Mountain massif
• Castle Rock of Triermain, a crag on Watson's Dodd in the English Lake District, U.K.

• Castle Rock Butte, a summit in South Dakota
• Castle Rock (Chelan County), a mountain summit in Washington
• Castle Rock (Colorado), a butte near the city of Castle Rock
• Castle Rock (Kansas), near the town of Quinter in northwestern Kansas
• Castle Rock (Michigan), a tourist attraction with steps for climbing north of St. Ignace
• Castle Rock (New York), an elevation located in Hamilton County
• Castle Rock (San Juan County, Utah), a butte at Monument Valley
• Castle Rock (Utah), a landmark at Lake Powell
• Castle Rock, also known as Castleton Tower, adjacent to Castle Valley
• Caudy's Castle ("Castle Rock"), a sandstone outcrop in Hampshire County, West Virginia
• Castle Rock (Pineville, West Virginia)

• Castle Rock Hoodoos Provincial Park, near Kamloops, British Columbia, Canada
• Castle Rock National Wildlife Refuge, near Crescent City, California
• Castle Rock Park, near Walnut Creek, California
• Castle Rock State Park (California), near Saratoga, California
• Castle Rock State Park (Illinois)

• Castle Rock, British Columbia, Canada
• Castle Rock, Karnataka, India
  • Castle Rock railway station, Karnataka
• Castlerock, Northern Ireland
  • Castlerock railway station

• Castle Rock, Colorado
• Castle Rock, Missouri
• Castle Rock, Oregon (disambiguation)
• Castle Rock, South Dakota
• Castle Rock, Utah, ghost town
• Castle Rock, Washington
• Castle Rock, Wisconsin, town
• Castle Rock (community), Wisconsin
• Castle Rock Township, Dakota County, Minnesota

• Castle Rock (Garrison, New York), a historic house in the Hudson Highlands
• Castlerock railway station, a railway station in County Londonderry, Northern Ireland

• Castle Rock (Stephen King), the fictional Maine town in many Stephen King works
• Castle Rock (TV series), the American television series based on Stephen King's fictional town
• Castle Rock, the mountain in William Golding's 1954 novel Lord of the Flies; inspiration for Stephen King's later use

• "Castle Rock", a 1951 song recorded by Frank Sinatra and Harry James
• "Cut Some Rug/Castle Rock", a 1996 double A-side single by the United Kingdom band The Bluetones
• Castle Rock (album), a 1955 album by American jazz saxophonist Johnny Hodges

• Castle Rock Brewery, a microbrewery located in Nottingham, England
• Castle Rock Entertainment, a film production company founded by Rob Reiner and named after Stephen King's fictional town
• Castle Rock Estate, an Australian winery based at Porongurup
• Castle Rock Foundation, an American conservative foundation
• The Castle Rock School, an English school located in Coalville
• Town of Castle Rock v. Gonzales, a 2005 United States Supreme Court decision
• Castle Rock Winery, an American winery based in California
• USS Castle Rock (AVP-35), a United States Navy seaplane tender in commission from 1944 to 1946