Julio Christian Sieburger (5 March 1892 – ?) was an Argentine sailor and Olympic medalist.
He competed at the 1936 and 1948 Olympics.He was a member of the Argentine crew on Djinn that received a silver medal in the 6 metre class at the 1948 Summer Olympics in London.
His teammates included his brother Enrique Sieburger, Sr.
while his son Roberto Sieburger was also competing in a different event (Three Person Keelboat) in the first of his five Olympics.