By Request is the first greatest hits album by Irish boy band Boyzone.

The album is their best-selling release to date, with sales of over 4 million copies worldwide.

The American-only single "Mystical Experience", appears as a bonus track on the Australian release, "Te Garder Pres De Moi", appears as a bonus track on the French release, and "Everyday I Love You" only appears on the Asian release of the album.

The latter was released as a single in the United Kingdom in December 1999 despite not being include on the U.K. edition of the album.

The album also features Ronan Keating's first solo outing, "When You Say Nothing at All", and three tracks only previously issued on the American version of Where We Belong.