Frank Lyon Polk (1871–1943)

Non-career appointee
State of Residence: New York

1. Counselor
   Appointed: August 30, 1915
   Entry on Duty: September 16, 1915
   Termination of Appointment: June 30, 1919
   • Commissioned as Counselor for the Department of State. Commissioned during a recess of the Senate; recommissioned after confirmation on Dec 17, 1915.
2. Under Secretary of State
   Appointed: June 26, 1919
   Entry on Duty: July 1, 1919
   Termination of Appointment: June 15, 1920
3. Secretary of State ad interim
   Appointed: February 14, 1920
   Termination of Appointment: March 14, 1920
   • Under Secretary of State; Acting Secretary of State