Mellen Clark Greeley (14 February 1880 - 4. September 1981) was an American architect in Jacksonville, Florida. He was considered to be the "Dean of Jacksonville Architects".
Greeley grew up in Jacksonville, but went away to boarding school for high school. In 1898, Greeley volunteered for the Spanish–American War and was sent to Cuba as part of the 3rd U. S. Volunteer Engineer Regiment.[1] After the war he stayed in the reserves (Florida national Guard) and served again as a lieutenant and then captain in the Quartermaster Corps in France during World War I.
Greeley apprenticed for draftsman J. H. W. Hawkins from 1901 to 1908 and opened his own practice in 1909. After his service in World War I, he joined Roy A. Benjamin, and they worked together for five years. He helped establish the Florida Association of Architects in 1912. Greeley was active in political issues and helped establish the Florida Board of Architecture in 1915, serving as its secretary from 1923 to 1955.[2] He also worked with zoning commissions and other regulators on things ranging from electrical codes to the management of hotel commissions.