Milen (Bulgarian: Милен) is a Bulgarian masculine given name. Notable people with the name include:

• Milen Bonev (born 1986), Bulgarian football player, currently playing for Kaliakra Kavarna as a defender
• Milen Dobrev (born 1980), Bulgarian weightlifter
• Milen Hristov (born 1977), Bulgarian footballer who currently plays for Neftochimic Burgas as a midfielder
• Milen Lahchev (born 1987), Bulgarian footballer, currently playing as a defender for Lokomotiv Sofia
• Milen Nachev, Bulgarian/American conductor and Principal Guest Conductor with the Romanian National Radio Symphony Orchestra & Choir
• Milen Petkov (born 1974), Bulgarian football player currently playing for Dobrudzha Dobrich
• Milen Radukanov (born 1972), former Bulgarian footballer, who currently manages Botev Plovdiv
• Milen Ruskov (1966), Bulgarian writer and translator
• Milen Tanev (born 1987), Bulgarian footballer, currently playing for Beroe as a midfielder
• Milen Tsvetkov (born 1966), Bulgarian journalist and TV host
• Milen Vasilev, Bulgarian football player, currently playing for Minyor Pernik as a midfielder
• Milen Veltchev (born 1966), the finance minister of Bulgaria from 2001 until 2005