David J. Whittaker (1945-) is a Mormon historian and bibliographer in Utah.

David Jay Whittaker was born in California on October 20, 1945. He received his bachelor's degree (1967) and Ph.D. from Brigham Young University, and a Master's degree from California State University at Northridge. He was a Beinecke Fellow at Yale University, and a Fulbright Fellow at the British Library in London. He was also a professor of history at Brigham Young University (BYU), and was president of the Mormon History Association. Whittaker worked as curator of Western and Mormon manuscripts at Brigham Young University Library in the L. Tom Perry Special Collections until his retirement in 2012. He has authored or co-authored seven books (including bibliographies on various topics in Mormon history) and about fifty scholarly articles, as well as multiple short and highly specialized Mormon history bibliographies. His works have appeared in the Encyclopedia of Mormonism, the Ensign, the Journal of Mormon History, BYU Studies, and other notable journals. Currently he is working with the Joseph Smith Papers Project. He is married to the former Linda Struhs, and they are the parents of four children.

The Warsaw signal (1840-1855) was a weekly newspaper based out of Warsaw, Illinois.

The Warsaw signal was first established as the Western world in 1830. The name was then changed to Warsaw signal in 1841 after being purchased my Thomas C. Sharp. The name was then changed to Warsaw message after Sharp sold the newspaper in 1843, but when Sharp rebought it in 1844, the name was changed back to the Warsaw signal. It was bought by James McKee in 1850 and later merged with the Journal of the people in 1855 to become the Express and journal. The Signal was a pro-Whig newspaper. The owner of the newspaper, Thomas C. Sharp, was an opponent of Joseph Smith and the Latter-day Saint settlements in Illinois, and the Signal supported the extermination or expulsion of the Mormon people in Illinois.