Hullo is a village on the fourth largest island of Estonia, Vormsi, in Lääne County, Estonia. It is the administrative centre of Vormsi Parish. The population of Hullo was estimated to be 245 as of January 1, 2010. Island inhabitants date back to the 13th century. During most of its history the island was inhabited by Estonian Swedes, whose population reached 3,000 before World War II. During the war, nearly all of Vormsi's population, including Hullo's; were evacuated to Sweden.
