Richard Lloyd Duwelius (born November 23, 1954) is an American former volleyball player who was a member of the United States national team that won the gold medal at the 1984 Summer Olympics in Los Angeles.

[1] Duwelius played volleyball at Ohio State University with future Olympic teammates Marc Waldie and Aldis Berzins, including at the 1977 NCAA Championship.

[2] Duwelius graduated from Ohio State in 1977 with a bachelor's degree in chemical engineering.

[2] Duwelius was a volleyball coach at Mitchell College in New London, Connecticut, and the Coast Guard Academy, also in New London.

[1] Duwelius is now the head coach of the Ledyard High School girls' volleyball team, in Ledyard, Connecticut.