Edgar Holmes Adams (April 7, 1868 – May 5, 1940) was an American competition diver and swimmer, numismatic scholar, author, coin collector and dealer.

[1][2] He represented the United States at the 1904 Summer Olympics in St. Louis, Missouri, where he won a silver medal in the men's plunge for distance event, finishing behind compatriot William Dickey.

Adams was a prolific numismatic author who coauthored, with William H. Woodin United States Pattern, Trial, and Experimental Pieces, but is probably best known for the reference volume Private Gold Coinages of California, 1849-1855: Its History and Its Issues, originally published serially (1911-1912) in the American Journal of Numismatics.

[4] He wrote a numismatics column for the New York Sun.

From 1912 to 1915 he served as editor of the American Numismatic Association journal The Numismatist.