The Library District is an officially designated neighborhood in Downtown Kansas City, Missouri, United States, roughly bounded by 9th and 11th Streets on the north and south and Main Street and Broadway on the east and west. The District contains a sub-district named the West Ninth Street/Baltimore Avenue Historic District listed on the National Register and which includes several buildings individually listed on the National Register of Historic Places. It also contains other notable structures not listed on the National Register.

Downtown Kansas City is the central business district (CBD) of Kansas City, Missouri and the Kansas City metropolitan area which contains 3.8% of the area's employment. It is between the Missouri River in the north, to 31st Street in the south; and from the Kansas–Missouri state line eastward to Bruce R. Watkins Drive as defined by the Downtown Council of Kansas City; the 2010 Greater Downtown Area Plan formulated by the City of Kansas City defines the Greater Downtown Area to be the city limits of North Kansas City and Missouri to the north, the Kansas–Missouri state line to the west, 31st Street to the south and Woodland Avenue to the east. However, the definition used by the Downtown Council is the most commonly accepted.