| Frank W. Hazelbaker | |
| State House: | Montana |
| Term Start: | 1940 |
| Term End: | 1947 |
| State House2: | Montana |
| Term Start2: | 1960 |
| Term End2: | 1964 |
| State Senate3: | Montana |
| Term Start3: | 1966 |
| Term End3: | 1984 |
| Birth Date: | 5 August 1912 |
| Birth Place: | Dillon, Montana, U.S. |
| Death Place: | Ronan, Montana, U.S. |
| Party: | Republican |
| Occupation: | Politician |
| Spouse: | Agnes Striker |
| Residence: | Missoula, Montana |
Frank Woodworth Hazelbaker (August 5, 1912 - March 16, 1990) was an American politician in the state of Montana who served in the Montana House of Representatives and Montana State Senate. He was Speaker pro tempore of the House in 1945 and the Speaker of the House in 1963.[1] [2] His father, Frank A. Hazelbaker was a Lieutenant Governor of Montana, and his maternal grandfather, George E. Woodworth served in the Montana House of Representatives.