The Subcommittee on the Investigation of Loyalty of State Department Employees, more commonly referred to as the Tydings Committee, was a subcommittee authorized by in February 1950 to look into charges by Joseph R. McCarthy. The mandate of the committee was to conduct "a full and complete study and investigation as to whether persons who are disloyal to the United States are, or have been, employed by the Department of State" The chairman of the subcommittee was Senator Millard Tyding, a Democrat from Maryland.