No and variants may refer to:
One of a pair of English words, yes and no, which signal confirmation or a negative response respectively
One of the English determiners
== Alphanumeric ==
No. (with dot) or №, also called the Numero sign, an abbreviation of the word "Number" as an identifier (or ordinal value), not as a quantity (cardinal value)
No (kana), a letter/syllable in Japanese script
No symbol, a circle with a diagonal line through it
== Geography ==
Lake No, South Sudan
New Orleans, Louisiana
Nō, Niigata, a town in Japan
No Creek (disambiguation)
NO, the ISO 3166-1 country code for Norway...