Kiryas Joel (also known as 'Kiryas Yoy'l', Kiryas Yo'el, or KJ; (Kiryas Yoyel) is a village within the town of Monroe in Orange County, New York, United States. The great majority of its residents are Hasidic Jews who belong to the worldwide Satmar Hasidic dynasty. Most of the village's residents speak Yiddish as their first language.
According to the Census Bureau's American Community Survey, Kiryas Joel has by far the youngest median age population of any municipality in the United States, and the youngest, at 13.2 years old, of any population center of over 5,000 residents in the United States. Residents of Kiryas Joel, like those of other Haredi Jewish communities, typically have large families.
According to 2008 census figures, the village has the highest poverty rate in the nation. More than two-thirds of residents live below the federal poverty line and 40% receive food stamps. It is also the place in the United States with the highest percentage of people who reported Hungarian ancestry, as 18.9% of the population reported Hungarian ancestry in 2000.