Henry Hammill Fowler (September 5, 1908 – January 3, 2000) was an American lawyer and politician who served as the United States Secretary of the Treasury under President Lyndon B. Johnson.

[4] After working briefly at Covington & Burling in Washington, D.C., Fowler joined the legal staff of the Tennessee Valley Authority (TVA) in 1934, where he helped establish the constitutionality of the program.

[4] He worked briefly at Covington & Burling in Washington, D.C., then joined the legal staff of the Tennessee Valley Authority (TVA) in 1934.

[7] With the onset of the Eisenhower administration, Fowler returned to his private law practice and served on the Democratic Advisory Council, which helped outline party positions on many issues.

Fowler served as a member of the Commission on Money and Credit from 1958 to 1961, and of the National Committee on Government Finance of the Brookings Institution from 1960 to 1961.

He then he returned to private law practice as senior member of the Washington firm of Fowler, Leva, Hawes and Symington.

He proposed (1967) a seminar (taken up by then Chancellor of the Exchequer James Callaghan) of financial officials from rich countries, the forerunner of the Group of Five.