Theophilus Nash Buckingam (31 May 1880 - 10 March 1971), commonly referred to as Nash Buckingham, was an American author and conservationist from Tennessee. He is perhaps most famous for writing a collection of short stories entitled De Shootinest Gent'man.
Buckingham was considered one of the most widely renowned and best-loved outdoor writers of his time and remains a favorite to many present-day readers of the genre. He wrote nine books and hundreds of articles that regularly appeared in such magazines as Outdoor Life, Field & Stream, and Sports Afield and Recreation. His writings were often accompanied by photographs taken by the author himself.
An avid shotgunner and wing shot, Buckingham was considered an authority on topics relating to waterfowl and upland birds, as well as the methods and tools used to hunt them. Although Buckingham pursued a variety of game in his lifetime, if his own writing is a true indication, it would seem that "Mr. Buck" possessed a special fondness for ducks and quail.