| F. B. Willis | |
| Office: | 3rd Lieutenant Governor of Idaho |
| Term: | January 2, 1893 – January 7, 1895 |
| Governor: | William J. McConnell |
| Predecessor: | John S. Gray |
| Successor: | F. J. Mills |
| Birth Date: | 10 October 1844 |
| Birth Place: | St. Lawrence County, New York |
| Death Place: | Lewiston, Idaho |
| Spouse: | Anna O. Diehl (1887–1889; died) Della B. Burns (m. 1892) |
| Residence: | Lewiston, Idaho |
| Alma Mater: | St. Lawrence Academy |
| Party: | Republican |
Frank B. Willis (October 10, 1844 – September 9, 1914) was an American politician from Idaho. A Republican, he served as the third lieutenant governor of Idaho. Willis was elected in 1893 along with Governor William J. McConnell.
He was born in New York in 1844, and he died in 1914 in Lewiston, Idaho of an ulcer complicated by a hemorrhage. At the time of his death he was serving as the City Treasurer of Lewiston.[1] [2]
Web site: Executive Branch . Idaho Bluebook . State of Idaho . 70–72 . August 14, 2010 . dead . https://web.archive.org/web/20100617045033/http://www.sos.idaho.gov/elect/bluebook/2010/03_executive.pdf . June 17, 2010 .