John Nicholas Luff of New York City was one of the important philatelists of the late 19th and early 20th centuries, notable as an early user of scientific methods in the study of postage stamps. The Luff Award of the American Philatelic Society is named after him.
August Dietz was a philatelist, editor and publisher, who specialized in the study of mail and postal history of the Confederate States of America.
Frederick John Melville was a British philatelist, prolific philatelic author and founder of The Junior Philatelic Society. He was also a founder in 1907 of the Philatelic Literature Society. Melville is a member of the American Philatelic Society's Hall of Fame and was a signatory to The Roll of Distinguished Philatelists in 1921.
Carroll Chase was an internationally recognized philatelic expert who specialized in classic stamps of the United States and France. In his effort to study classic French stamps, he traveled to France and remained there until 1941 when he returned to the United States.
Beverly Sedgwick King, of New York City, was an American architect, a partner with Mrs. Andrew Carnegie's brother, Henry D. Whitfield, in the firm Whitfield & King. He is now known primarily for his work as a philatelist who specialized in the collecting of, and writing philatelic literature on, United States postage stamps.
Col. Max G. Johl of Connecticut, was an American philatelist who specialized in the collecting of, and writing philatelic literature on, United States postage stamps.
Henry M. Goodkind of New York City, was a distinguished American philatelist who specialized in the study of air mail postage stamps of the world, and published numerous articles and studies on the subject.
The Roll of Distinguished Philatelists (RDP) is a philatelic award of international scale, created by the Philatelic Congress of Great Britain in 1921. The Roll consists of three pieces of parchment to which the signatories add their names.
George Ward Linn, of Ohio, was a philatelist who published philatelic literature extensively and was the founder of Linn's Weekly Stamp News in 1928, the philatelic journal for which he is most famous.
Sidney F. Barrett (1892–1958) of New York City, was a prominent stamp dealer who participated in various important philatelic ventures in New York City itself.
Richard H. Thompson was a philatelist from Baltimore, Maryland, who supported stamp collecting at the national level as well as in the Baltimore area.
Peter G. Keller, of New York, was a stamp dealer who, along with his wife Helen Van Zilen Keller, helped develop the organization of stamp dealers in the United States.
Solomon Glass, of Baltimore, Maryland, was a philatelist who was recognized as a foremost expert in United States postage stamps of the 20th century.
Catherine Lemmon Manning, of Washington, D.C. served the philatelic community by her work in several philatelic societies, and the American public by her service at the National Postal Museum.
Svend Yort (1908–1981) was a noted collector of the postage stamps and postal history of Scandinavia, and was a writer and expert on the subject.
Carl Einar Pelander was a stamp dealer and auctioneer who was an expert on postage stamps and postal history of the Scandinavian countries of Denmark, Greenland, Iceland, Danish West Indies, Finland, Norway, and Sweden.
Victor E. Engstrom was an American philatelist known for his knowledge and collections of stamps of Nordic countries.
Lloyd B. Gatchell of New York City, was a philatelist who was named to the Hall of Fame of the American Philatelic Society. He was known as “Bart” to his philatelic friends and acquaintances.
Ezra Danolds Cole, of Nyack, New York, was well known stamp dealer who was named to the Hall of Fame of the American Philatelic Society.
