Coeducation is the integrated education of males and females at the same school facilities. The opposite situation is described as single-sex education. Most older institutions of higher education restricted their enrollment to a single sex at some point in their history, and since then have changed their policies to become coeducational.

Co-ed is a shortened adjectival form of co-educational, and the word co-ed is sometimes also used, in the United States, as a noun to refer to a female college student. The word is also often used to describe a situation in which both genders are integrated in any form (e.g. "The team is co-ed").