From August 14, 1911 to March 3, 1913, the office of President pro tempore of the United States Senate for the 62nd Congress rotated among five individuals. The sitting Senate President pro tempore William P. Frye resigned due to ill health on April 27, 1911. The Senate at that time was split between progressive Republicans, conservative Republicans, and Democrats. Each put forth a candidate, and the ballots were deadlocked until August when a compromise was reached. Democratic candidate Augustus Bacon served as pro tempore for one day on August 14, 1911, and thereafter he and four Republicans rotated holding the seat for the remainder of the 62nd Congress.
| President pro tempore | Term |
|---|---|
| William P. Frye | February 7, 1896–April 27, 1911 |
| Augustus O. Bacon | August 14, 1911 |
| Charles Curtis | December 4–December 12, 1911 |
| Augustus O. Bacon | January 15–January 17, 1912 |
| Jacob H. Gallinger | February 12–February 14, 1912 |
| Augustus O. Bacon | March 11–March 12, 1912 |
| Frank B. Brandegee | March 25–March 26, 1912 |
| Augustus O. Bacon | April 8, 1912 |
| Jacob H. Gallinger | April 26–April 27, 1912 and May 7, 1912 |
| Augustus O. Bacon | May 10, 1912 |
| Henry Cabot Lodge | May 25, 1912 |
| Augustus O. Bacon | May 30–June 3, 1912 and June 13–July 5, 1912 |
| Jacob H. Gallinger | July 6–July 31, 1912 |
| Augustus O. Bacon | August 1–August 10, 1912 |
| Jacob H. Gallinger | August 12–August 26, 1912 |
| Augustus O. Bacon | August 27–December 15, 1912 |
| Jacob H. Gallinger | December 16, 1912 and January 4, 1913 |
| Augustus O. Bacon | January 5–January 18, 1913 |
| Jacob H. Gallinger | January 19–February 1, 1913 |
| Augustus O. Bacon | February 2–February 15, 1913 |
| Jacob H. Gallinger | February 16–March 3, 1913 |
| Preceded by William P. Frye |
President pro tempore of the United States Senate Rotating 1911–1913 |
Succeeded by James P. Clarke |