Jiannis-Georgios Karl Smalios (also "Ioannis-Georgios Smalios", ; born February 17, 1987 in Stockholm, Sweden) is a Swedish-born Greek javelin thrower. He won the gold medal for his category at the 2005 European Junior Championships in Kaunas, Lithuania, with a personal best throw of 77.25 metres. In 2010, Smalios improved his own record to 80.77 metres at the European Athletics Outdoor Classic Meeting in Kalamata. Few months later, he applied and granted a Swedish citizenship in order to compete internationally for his birth nation.