An adult high school is a high school facility for adult education. It is intended primarily for adults who have not completed high school to continue their education in a facility which offers child care for single parents, special integration programs for immigrants, career counselling and other programs and services geared toward the special needs of adult students.

A number of cities in the United States and Canada have dedicated adult high school facilities. In most other cities, adults returning to high school attend regular high schools or community colleges.

Some adult high schools may also offer general interest programs such as computer skills upgrading or other continuing education courses.