Throughout most of the 20th century, Mullica Hill has served as the principal town and seat of government for Harrison Township and its businesses catered to the needs of surrounding farms. While agriculture today is still an important local industry, Mullica Hill's businesses are no longer locally oriented. The town has emerged as a Main Street Shopping District hosting shops ranging from Antiques, Jewelry, Collectibles, Furniture, Fine Art, Boutiques and Crafts. Restaurants, Coffee Houses and a Victorian Tea Room add to the towns nostalgic charm. Historic homes have been restored and the streets now bustle with visitors from throughout the eastern seaboard.
In 1991, the entire village was placed on the National Register of Historic Places and the New Jersey State Register of Historic Places in recognition of its historic and architectural significance. The following year, Harrison Township established the village as a local historic district.