636 (disambiguation)

636 is one of the Arabic numerals in the 600 (number) range. It may also refer to:
 * the year 636
 * the area code 636 in the United States
 * a British fighter-trainer, the Avro 636, dating from the 1930s
 * 636 Erika, a minor planet orbiting the Sun and discovered in 1907
 * the minuscule 636 (in Gregory-Åland numbering) is a New Testament manuscript
 * United Nations Security Council Resolution 636 from July 1989 regarding certain Palestinians deported from Israeli-occupied territories
 * 636cc versions of the Kawasaki ZX-6R