Passaic is a city in Passaic County, New Jersey, United States. As of the United States 2000 Census, the city had a total population of 67,861. Located north of Newark on the Passaic River, it was first settled in 1678 by Dutch traders, as Acquackanonk Township. The city and river draw their name from the Lenape word 'pahsayèk' meaning 'valley'. Passaic apartments for rent comparison page shows most up to date rent information on Passaic apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.