Robert P. Odenweller (born c. 1940) is an American philatelist who is a member of the National Postal Museum's Council of Philatelists and a signatory to the Roll of Distinguished Philatelists. He is a member of The Collectors Club of New York, and an Honorary Fellow of the Royal Philatelic Society London and the Royal Philatelic Society of New Zealand. From 1996 to 2000 he was President of the Grand Prix Club.