Julio Velasco (born 9 February 1952) is an Argentine-Italian volleyball coach and former professional player. He is currently the head coach of the Italy women's national volleyball team, which he led to victory at the 2024 Paris Olympics and the 2025 World Championship.

During his career, Velasco has coached several national teams to podium finishes. He has won two Olympic medals (one gold and one silver), three World Championships (becoming the first – and so far only – coach to win both the men's and the women's titles), three European Championships, two Asian Championships, three Mediterranean Games medals (two gold and one silver), and a gold medal at the Pan American Games. He has also claimed eleven additional international titles.

In club competitions, Velasco has won four Argentine championships, four Italian championships, three Italian Cups, one Italian Super Cup, and one CEV Cup Winners' Cup.

In 2005 he was inducted into the International Volleyball Hall of Fame.

Julio Velasco began playing volleyball at the age of 15 for the National University of La Plata Club.

Velasco became an assistant coach of the Argentina men's national volleyball team from 1981 to 1983.

In 1983, he was invited to coach Tre Valli Jesi in Italy, where he remained until 1985. He then coached Panini Modena from 1985 to 1989, leading them to four consecutive Italian national championships from 1986 to 1989.

In 1989, he was appointed head coach of the Italy men's national volleyball team, leading them to unprecedented success. His first trophy with the Italian side came at the 1989 Men's European Volleyball Championship in Sweden, where they topped their preliminary group with only one loss, advanced through the knockout stage, and defeated the host nation Sweden 3–1 in the final to win their first official international title.