Harry Lemuel Lindquist (August 15, 1884 – January 16, 1978) was an editor and publisher specializing in the publication of philatelic literature during the early 20th century.
He operated his publishing business from New York City at 1 West 46 Street.
Lindquist was responsible, during the period 1939–1948, for editing and publishing a series of twenty books containing detailed philatelic research by various philatelic writers.
Lindquist was responsible for editing or publishing much philatelic literature including the following books: Lindquist founded and became president of the National Federation of Stamp Clubs which grew to 600 clubs nationwide and 200,000 members.
He also served as a member of the Postmaster General's Citizens' Stamp Advisory Committee, serving in that position 1957 to 1961.