Ironbound is an unincorporated community and neighborhood within the city of Newark in Essex County, New Jersey, United States. It is a large working-class, close-knit, multi-ethnic community covering approximately four square miles (10 km²). Historically, the area was called "Dutch Neck," "Down Neck," or simply "the Neck," due to the appearance of the curve of the Passaic River. The Ironbound is part of Newark's East Ward and is directly east of Newark Penn Station and Downtown Newark, and south and west of the river, over which passes the Jackson Street Bridge, connecting to Harrison and Kearny.