Del is a vector differential operator represented by the symbol ∇ (nabla).

Del or DEL can also refer to:

• A name for the partial derivative symbol ∂
• Dynamic epistemic logic

• DEL or Del, for Delaware, one of the United States
• DEL or Del, for Delhi, the capital of India
• Del, for the constellation Delphinus
• Del., for a non-voting delegate to the United States House of Representatives

• Del (given name), a list of people with the given name or nickname
• Del Shannon, stage name of American rock and country singer-songwriter Charles Weedon Westover (1934–1990)
• Del tha Funkee Homosapien (short for "Delvon"), American hip hop artist
• Del Fontaine (1904–1935), Canadian boxer and convicted murderer born Raymond Henry Bousquet

• Del Boy, lead character in the BBC comedy series Only Fools and Horses
• Del Dingle, fictional character in the ITV soap opera Emmerdale
• Del, robot alligator villager from the video game series Animal Crossing

• DEL, Data-Entry Language, predecessor of the Lua programming language
• Del (command), a DOS, OS/2, and Microsoft Windows shell command
• <del></del>, HTML tags used to mark text for deletion
• Delete character, also known as rubout
• Delete key, abbreviated Del on computer keyboards

• Department for Employment and Learning, part of the Northern Ireland government
• Deutsche Eishockey Liga, the premier ice hockey league in Germany
• DNA Encoded Chemical Library, a technology for the synthesis and screening of collections of chemical compounds

• DEL, IATA code for Indira Gandhi International Airport, Delhi, India
• del, ISO 639-2 and 639-3 codes for the Delaware languages of Native Americans

• "Del", a song on the album 3rd Eye Vision by Hieroglyphics

• DEL2, the second tier of ice hockey in Germany, below the DEL
• Deel (disambiguation)
• Dell (disambiguation)