Julio Fernández may refer to:

• Júlio "Foca" Fernandez Brazilian jiu-jitsu champion and instructor
• Julio Ángel Fernández (born 1946), Uruguayan astronomer who hypothesised the existence of what became known as the Kuiper belt
• Julio M. Fernandez (born 1954), Chilean Professor in the Department of Biological Sciences at Columbia University, New York, USA
• Julio Fernández (musician) (born 1954), guitarist of jazz fusion/smooth jazz group Spyro Gyra
• Julio Fernández (film producer), co-founder of the Fantastic Factory film studio