| Frank B. Warner | |
| State Senate: | Missouri |
| District: | 29th |
| Term Start: | Elected 1912 |
| Term End: | ? |
| Birth Date: | November 5, 1863[1] |
| Birth Place: | St. Louis, Missouri |
| Nationality: | American |
| Party: | Republican |
| Occupation: | Jewelry businessman |
Frank B. Warner (November 5, 1863 – February 15, 1944) was an American politician who served in the Missouri Senate and the Missouri House of Representatives. He was educated in the St. Louis area public schools.[2] Warner did not make a floor speech in the legislature until he had surpassed 22 years of service, and then spoke for only a minute. He introduced only one bill, due to his belief that law books were already overburdened with laws.[3]
Warner died in his home in St. Louis at the age of 79.[3]