The L. Tom Perry Special Collections is the special collections department of Brigham Young University (BYU)'s Harold B. Lee Library in Provo, Utah. Founded in 1957 with 1,000 books and 50 manuscript collections, as of 2016 the Library's special collections contained over 300,000 books, 11,000 manuscript collections, and over 2.5 million photographs, among many other rare and unique research materials. Since its inception, the special collections have been housed in numerous places including the crawl space of a university building and a wholesale grocery warehouse. Since 2016, the special collections have been located on the first floor of the Harold B. Lee Library and is considered to hold "the finest collection of rare books in the Intermountain West and the second finest Mormon collection in existence".

The Harold B. Lee Library (HBLL) is the main academic library of Brigham Young University (BYU) located in Provo, Utah. The library started as a small collection of books in the president's office in 1876 before moving in 1891. The Heber J. Grant Library building was completed in 1925, and in 1961 the library moved to the newly constructed J. Reuben Clark Library where it stands today. That building was renamed to the Harold B. Lee Library in 1974.