Libert is a surname. Notable people with the surname include:
Clement Liebert (15th century), Franco-Flemish singer and composer
Joy Liebert (1914–1999), English cricketer
Kathy Liebert (born 1967), American professional poker player
Mary Ann Liebert, founder of Mary Ann Liebert, Inc., a publishing company
Ottmar Liebert, German-born composer and guitarist
Ralph Liebert, founder of Liebert (company)
Reginaldus Liebert (15th century), French composer