Robert Dale McHenry (born April 30, 1945) is an American editor, encyclopedist, philanthropist and writer. McHenry worked from 1967 for Encyclopædia Britannica Inc. or associated companies, becoming editor-in-chief of the Encyclopædia Britannica in 1992, a position he held until 1997. McHenry is also author of the book How to Know (2004), and a frequent contributor to journals.
McHenry was born in St. Louis, Missouri. He attended Northwestern University in Evanston, Illinois, and received a Bachelor of Arts degree in 1966. He also received a master's degree from the University of Michigan in 1967. Later in life, McHenry undertook further study at Northwestern University, where he graduated from Northwestern's Kellogg School of Management with a Master of Business Administration in 1987.
McHenry's career at Encyclopædia Britannica Inc. began in 1967. After two years, he transferred to San Francisco Productions to work for Mortimer Adler, where he co-edited (with Charles Van Doren) Webster's Guide to American History, A Documentary History of Conservation in America, and Webster's American Biographies. McHenry transferred in 1975 to G. & C. Merriam Co. (later renamed Merriam-Webster Inc.) where he edited Webster's American Military Biographies, Famous American Women, Liberty's Women, and Webster's New Biographical Dictionary.
McHenry returned to Britannica in 1982 as editor of Compton's Yearbook, which was an annual supplement to Compton's Encyclopedia. McHenry later joined the editorial staff of the Encyclopædia Britannica, initially as director of Britannica yearbooks, later progressing to become managing editor of the encyclopedia itself in 1986, general editor in 1990, and editor-in-chief in 1992.