| John Farr Simmons | |
| Office1: | 8th Chief of Protocol of the United States |
| President1: | Harry S. Truman Dwight D. Eisenhower |
| Term Start1: | August 18, 1950 |
| Term End1: | January 31, 1957 |
| Successor1: | Wiley T. Buchanan Jr. |
| Office2: | United States Ambassador to Ecuador |
| Term Start2: | July 16, 1947 |
| Term End2: | July 12, 1950 |
| Predecessor2: | Robert M. Scotten |
| Successor2: | Paul C. Daniels |
| President2: | Harry S. Truman |
| Office3: | United States Ambassador to El Salvador |
| Term Start3: | February 21, 1945 |
| Term End3: | July 1, 1947 |
| Predecessor3: | Walter C. Thurston |
| Successor3: | Albert F. Nufer |
| President3: | Franklin D. Roosevelt |
| Birth Name: | John Farr Simmons |
| Birth Date: | January 3, 1892 |
John Farr Simmons (January 3, 1892 – January 1, 1968) was an American diplomat who served as Chief of Protocol of the United States from 1950 to 1957. He also served as the U.S. Ambassador to Ecuador and El Salvador in the late 1940s.
As a career Foreign Service Officer, Simmons was appointed the U.S. Ambassador to El Salvador on September 21, 1944. He presented his credentials on February 21, 1945, and remained in the position for more than two years until he was chosen to become U.S. Ambassador to Ecuador. He left El Salvador on July 1, 1947, and arrived in Ecuador later that month. He left the post on July 12, 1950.
Just over a week later, on July 21, 1950, Simmons was named to become Chief of Protocol at the U.S. State Department under President Harry S. Truman. He took office on August 18, 1950, and retained his role under President Dwight D. Eisenhower. He left the position on January 31, 1957.[1] [2]