He was born in New York City to Walter Hoving, the head of Tiffany & Company, and his wife, Mary Osgood Field. Thomas Hoving grew up surrounded by New York's upper social strata. As recounted in his memoir, Making the Mummies Dance, these early experiences would be invaluable in his later dealings with the Met's donors and trustees.
After graduating from Hotchkiss School in 1949, he received a B.A. in 1953, a M.F.A. in 1958, and a Ph.D. in 1959, all from Princeton University. He went to work for the Met in 1959, serving on the staff of the medieval department at The Cloisters until 1965, when he became curator of the department. He left the Met in 1966 to become New York Mayor John V. Lindsay's parks commissioner, but in 1967 returned to the Met as director after the incumbent, James J. Rorimer, died suddenly on March 11, 1966. He assumed the directorship on March 17, 1967 and presided over a massive expansion and renovation of the museum, successfully adding many important collections to its holdings.
He left the Met on June 30, 1977 to start an independent consulting firm for museums, Hoving Associates. From 1978 to 1984 he was an arts correspondent for the ABC newsmagazine 20/20. He edited Connoisseur Magazine from 1981 to 1991; along with his memoirs of his time at the Met, he is also the author of books on a number of art-related subjects, including art forgeries, Grant Wood, Andrew Wyeth, Tutankhamen, and the 12th-century walrus ivory crucifix known as the Bury St. Edmunds Cross. Additionally, in 1999, he wrote the text for the Art For Dummies book in the "...For Dummies" series.
Hoving appeared in Who the *$&% Is Jackson Pollock?, a 2006 documentary by Harry Moses about a purported "lost" Jackson Pollock painting, in which he, through a series of memorable interviews, claimed that true painting connoisseurs are the only ones who can identify the real from the fake (fingerprints and forensic evidence are secondary).
Hoving was the subject of the titular profile in A Roomful of Hovings and Other Profiles, a 1969 collection of biographical pieces by John McPhee.
Career at the Metropolitan Museum of Art
His tenure at the Metropolitan Museum of Art was characterized by his distinctive approach to expanding the Met's collections. Rather than build more comprehensive holdings of relatively modest works, he pursued a smaller number of what he termed "world-class" pieces, including the Euphronios krater depicting the death of Sarpedon (returned to Italy in 2008), Velázquez's Portrait of Juan de Pareja, and the Temple of Dendur. 
The expansion of the Met during Hoving's directorship was not confined to its collections. Hoving also spearheaded a number of building projects and renovations of the Met itself, from a controversial expansion of its galleries into Central Park to the construction of its underground parking garage.
Two of the building's most characteristic features—the huge exterior banners announcing current shows, and the broad plaza and steps leading from Fifth Avenue to the Met's entryway—are products of Hoving's tenure. At one point, he even floated a plan to remove the Met's "great staircase" leading from the central lobby to the second-floor galleries. That particular project remains unrealized. :156-163
Hoving described the negotiations between the Metropolitan Museum, the Cairo Museum, Egypt’s Organization of Antiquities, and the U.S. State Department to bring the exhibition The Treasures of Tutankhamun to the Met as “the high point of my Metropolitan career.”  The exhibition was the result of years of negotiations, including plans for a variety of cross-cultural collaborations, galvanized by President Richard M. Nixon’s June 1974 trip to Egypt and finalized in an accord signed by Secretary of State Henry A. Kissinger and Foreign Minister Ismail Fahmi in October 1975. In July 1976, Hoving visited Egypt to negotiate terms of the traveling exhibition and finalize details of the Museum's collaboration with officials there.
- Randy Kennedy (December 11, 2009). "Thomas Hoving, Who Shook Up the Met, Dies at 78". New York Times. Retrieved 2010-09-17. "Thomas Hoving, the charismatic showman and treasure hunter whose tenure as director of the Metropolitan Museum of Art from 1967 to 1977 fundamentally transformed the institution and helped usher in the era of the museum blockbuster show, died on Thursday at his home in Manhattan. He was 78."
- Hoving, Thomas. Artful Tom, A Memoir (Chapter 29). Artnet Magazine, June 10, 2009.
- Hoving, Thomas. "My Eye," Artnet Magazine, July 20, 1999.
- Kennedy, Randy. "Could Be a Pollock; Must Be a Yarn," The New York Times, Thursday, November 9, 2006.
- Thomas Hoving, Making the Mummies Dance: Inside the Metropolitan Museum of Art, Simon & Schuster, 1993.
- Finding aid for the Irving MacManus records related to "Treasures of Tutankhamun" exhibition, 1975-1979 in the Metropolitan Museum of Art Archives.
- Watson, Peter (2007). The Medici Conspiracy. New York: Public Affairs. ISBN 978-1-58648-438-5.
- McPhee, John (1969). A Roomful of Hovings. New York: Farrar, Straus and Giroux.
- Hoving, Thomas (1993). Making the Mummies Dance: Inside the Metropolitan Museum of Art. New York: Simon and Schuster. ISBN 978-0-671-88075-0.
- Hoving, Thomas (1997). False Impressions: The Hunt for Big-Time Art Fakes. New York: Simon and Schuster. ISBN 0-684-81134-0.
- Hoving, Thomas. King of the Confessors. Simon and Schuster: New York, 1981.
- Hoving, Thomas. King of the Confessors: A New Appraisal. cybereditions.com: Christchurch, NZ, 2001.
- "Outdoorsman of the Big City," Life (magazine), April 29, 1966.
James J. Rorimer
Director of the Metropolitan Museum of Art
Philippe de Montebello