Warren Township is located in northeastern Somerset County along the wooded ridges and valleys of the Watchung Mountains. The municipality includes established residential neighborhoods, corporate and professional campuses, schools, parks, houses of worship, and several small commercial centers. Interstate 78 crosses the northern part of the township, providing direct access toward Newark, New York City, and western New Jersey. Mountain Avenue, Stirling Road, and other county routes connect Warren with Watchung, Berkeley Heights, Long Hill, Bridgewater, and neighboring communities. The township contains areas historically known as Mount Bethel, Warrenville, and Dead River, reflecting its development from rural settlements into a largely residential suburb. Streams, wetlands, and preserved woodland remain visible throughout the landscape, and local parks support recreation and community events. Warren's combination of highway access, low-density neighborhoods, and substantial open space gives it a distinct position between the denser Union County suburbs and central Somerset County.