Lewis H. Sweetser was a Republican politician from Idaho. He attended the University of California, Class of 1889, where he was a member of the Chi Phi Fraternity. Sweetser served as the 11th Lieutenant Governor of Idaho from 1909 to 1913 during the administrations of Governors James H. Brady and James H. Hawley.
Sweetser also served in the Idaho Legislature. He was a member of the Idaho State House of Representatives from 1901 to 1902 and from 1905 to 1906.
| Political offices | ||
|---|---|---|
| Preceded by Ezra A. Burrell |
Lieutenant Governor of Idaho January 4, 1909–January 6, 1913 |
Succeeded by Herman H. Taylor |