List of 21st-century classical composers

This is a list of 21st-century classical composers, sortable by name, year of birth and year of death.

The list includes composers who have made a significant impact on the world of classical music since 2001, whether through major festivals and promoters of contemporary music, broadcast media or commercial recording on widely distributed labels. These composers work in the tradition of classical music. The 21st century is defined by the calendar rather than by any unifying characteristics of musical style or attitude, and is therefore not an era of the same order as the classical or romantic. However, the century to date can be considered a continuation of the postmodern era that began during the 20th century and differs from the earlier modernist era in matters of attitude more than style.