Roseland is a borough in western Essex County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 6,299, an increase of 480 from the 2010 census count of 5,819, which in turn reflected an increase of 521 from the 5,298 counted in the 2000 census. In 2015, New Jersey Monthly magazine ranked Roseland as its seventh-best place to live in its "Best Places To Live" in New Jersey rankings.