402 may refer to:

402 (year), the year 402. 402 (number), the number 402. 402 BC, the year 402 Before Christ. 402 Chloë, an asteroid. Area code 402, a telephone area code. Cessna 402, a type of aircraft. IBM 402, a 1940 accounting machine. Peugeot 402, a type of car. X.402, defines the system architecture of an X.400 Message Handling System.

See also 402nd (disambiguation)