0 is a number and a numerical digit.

0 may also refer to:

• 0 (album), a 2014 album by Low Roar
• 0, a 2013 album by Ichiko Aoba
• 0, a character from the Kirby video game series
• 0, a character in Star Trek: The Q Continuum
• 0 or #0, stage name of American musician Sid Wilson, when performing with the band Slipknot

• 0 (year), a year used in some calendar systems
• Lightyear 0, an all-solar-electric executive liftback
• Slashed zero (0̷), a glyph used to distinguish the numeral 0 from the letter O
• 42nd Street Shuttle (internal code: 0),a New York City Subway shuttle train service, US

• /dev/zero a special file in Unix-like operating systems that outputs null characters
• Symbols for zero
• #0 por Movistar Plus+, a former Spanish TV channel
• O, a letter of the Latin alphabet
• Ø, a letter of several Scandinavian alphabets
• Circle symbol (disambiguation)
• Empty set (∅), the set having no elements
• Zero sharp (0#), in the Gödel constructible universe
• Phi (Φ), a letter of the Greek alphabet
• Theta (Θ), a letter of the Greek alphabet
• ⌀, the diameter symbol
• 00 (disambiguation)
• 0° (disambiguation)
• Ø (disambiguation)
• Null (disambiguation)
• Zero (disambiguation)
• Year Zero (disambiguation)
• All pages with titles beginning with 0
• All pages with titles containing 0