Guernsey usually refers to either:

• Guernsey, the island or, more rarely, the whole jurisdiction of the ten parishes including smaller offshore islands such as Lihou, Jethou and Herm.
• Bailiwick of Guernsey, a Crown dependency composed of the jurisdictions of Guernsey, Alderney and Sark, as well as a number of smaller islands

Guernsey may also refer to:

• Guernsey cattle, a breed of cattle
• Golden Guernsey, a breed of goats

• Frank Edward Guernsey (1866–1927), U.S. Representative from Maine (1908–1917)
• Frank Guernsey (tennis) (1917–2008), American tennis player
• George H. Guernsey (1839–1900), American architect from Montpelier, Vermont
• Henry Guernsey Hubbard (1850–1899), American horticulturist, botanist, and entomologist
• John Guernsey (born 1953), American bishop in the Anglican Church in North America
• Lisa Guernsey (born 1971), American early education researcher, author, and former journalist
• Otis Guernsey Jr. (1918–2001), American writer
• Sarah Elizabeth Mitchell Guernsey (1860–1939), Founder of the National Society Daughters of the American Colonists and President General of the Daughters of the American Revolution
• Sherwood Guernsey (born 1946), Massachusetts state representative
• Stephen Guernsey Cook Ensko (1896–1969), expert on American antique silver
• Wellington Guernsey (1817–1885), Irish composer and poet

• Guernsey, Indiana
• Guernsey, Iowa
• Guernsey, Ohio
• Guernsey, Wyoming
• Guernsey County, Ohio
• Guernsey Dam, earthfill dam on the North Platte River in the U.S. State of Wyoming

• Guernsey, Saskatchewan, Canada
• Mount Guernsey, an isolated mainly ice-covered mountain on the west coast of the Antarctic Peninsula

• Guernsey (2005 film), Dutch film by Nanouk Leopold
• The Guernsey Literary and Potato Peel Pie Society, 2008 novel
  • The Guernsey Literary and Potato Peel Pie Society (film), 2018 film adaptation

• Guernsey (Australian rules football), type of shirt worn by Australian rules football players
• Guernsey (clothing), seaman's knitted woollen sweater, similar to a jersey

• HMS Guernsey, the name of four ships of the Royal Navy, and two planned ones
  • HMS Guernsey (1696), 50-gun fourth rate ship of the line of the Royal Navy, launched in 1696
  • HMS Guernsey (P297), Island-class offshore patrol vessel of the Bangladesh Navy

• Guernsey Cricket Board
• Guernsey FA Cup
• Guernsey F.C., association football
• Guernsey RFC, rugby

• Guernsey's, an auction house in New York City

• Gersey
• Guerny
• All pages with titles beginning with Guernsey
• All pages with titles containing Guernsey