The most popular costume in every state

As Christianity spread, elements of Samhain merged with Christian celebrations, particularly All Hallows' Eve, the night before All Hallows' Day. This mix encouraged people to dress up as saints, angels, or demons, further shaping the modern Halloween costume tradition. In the 19th century, Irish and Scottish immigrants brought these customs to America, where Halloween began to develop into a community celebration. The late 19th and early 20th centuries saw a rise in elaborate costumes influenced by popular culture, and companies began mass-producing costumes for children and adults alike.