Josephine-Louise Hall, better known as JL, is a charming, three-story building and one of four original buildings on the present Newcomb campus. It is the second Newcomb College residence hall to be named in honor of the school's benefactress, Mrs. Josephine Louise Lemonnier Newcomb (the first was on its 1880s Garden District campus). Many of the rooms are unique in character and do not have standard dimensions. The building offers many popular features such as moveable, Shaker-style, wood furniture; lovely, old-fashioned, casement windows; high ceilings; extra long mattresses; mounted bookshelves; and cable TV and Internet access. Many rooms have a sink and mirror in one corner.

JL is a nonsmoking, all female hall with open visitation and a Desk Service Coordinator on duty twenty-four hours a day. All visitors must show their IDs at the desk from 8 p.m. to 8 a.m. Male visitors in the building must be escorted at all times.