Charles Sumner Hamlin (August 30, 1861 – April 24, 1938) was an American lawyer. He was the first Chairman of the Federal Reserve, serving from 1914 to 1916. Charles Hamlin was born in Boston, Massachusetts on August 30, 1861, and graduated from Harvard University in 1886. From 1893 to 1897 and again from 1913 to 1914 he was the Assistant Secretary of the Treasury. He twice ran unsuccessfully for governor of Massachusetts, in 1902 and 1910. On August 10, 1914, he was appointed the first Chairman of the Federal Reserve and served in that capacity until August 10, 1916. He lectured at Harvard on government in 1902 and 1903; In 1912 was vice president of the Woodrow Wilson College Men’s League and president of the Woodrow Wilson League of Massachusetts; and he published, besides pamphlets on statistical and financial subjects, an Index Digest of Interstate Commerce Laws (1907) and the Index Digest of the Federal Reserve Bulletin (1921). Hamlin died in Washington, D.C. on April 24, 1938. He was buried at Forest Hills Cemetery in Jamaica Plain, Massachusetts. In 1898 Sumner married Huybertje Lansing Pruyn (April 8, 1878 – March 6, 1964), the daughter of John V. L. Pruyn and granddaughter of Amasa J. Parker. Charles Hamlin’s papers are archived at the Library of Congress.