Cedar Knolls is an unincorporated area located within Hanover Township in Morris County, New Jersey. It is part of Hanover Township along with Whippany. Though Cedar Knolls has its own post office, many residents have Morris Plains postal addresses, which confuses those seeking to know the borders of Cedar Knolls. Rigdedale avenue is the main road in Cedar Knolls. The elementary school for kids 5-11 that live in Cedar Knolls is Mountview Road School. Teens ages 11-14 who live in Cedar Knolls go to Memorial Junior School in Whippany. For details on Cedar Knolls, see Hanover Township.