The New Jersey Room is a collection of materials about New Jersey with an emphasis on Jersey City and Hudson County. The collection, numbering over 20,000 volumes, includes both current and historical information. In addition to books, the New Jersey Room has a complete collection of all published Jersey City/Hoboken city directories dating from 1849 to 1925; an index for the Jersey Journal for the years 1912-1954 and 1969 to 2003, a picture collection of over 13,000 images; hundreds of historic and contemporary maps; over 150 periodicals; manuscript collections; and several thousand topical files.