Tom Buk-Swienty (born July 19, 1966 in Eutin) is a Danish historian, journalist and author, known for his work on the Second Schleswig War.

Buk-Swienty was raised in Sønderborg, Denmark.

Buk-Swienty holds degrees in history and American Studies from the University of Copenhagen and the University of California. During 1994-2005, he served as the American correspondent for the Danish periodical Weekendavisen and also as a lecturer at the University of Southern Denmark in Odense until 2010. He is now an independent author and since 2014 has been an adjunct professor in history at University of Southern Denmark.

His writing career began during his US stay where he wrote books based on his knowledge of America. After his return to Denmark, he began studying the war of 1864, and he then wrote the first volume of his two-volume work on that conflict. The first book was well received and received several awards, which spawned the second volume of the work two years later. In 2013 he published the first volume of a two-volume biography of Wilhelm Dinesen, Karen Blixen's father, "Captain Dinesen. Fire and blood" and the second volume, "Captain Dinesen. Till death do us part", published in October 2014.

He is married to Annette and has a son Alexander and a daughter Sasha.