| Frederick B. Roos | |
| Birth Name: | Frederick Bernard Roos |
| Birth Date: | 22 November 1883 |
| Birth Place: | Chicago, Illinois |
| Death Place: | Forest Park, Illinois |
| Occupation: | Lawyer, businessman, politician |
| Party: | Republican |
| Office1: | Member of the Illinois Senate |
| Term Start1: | 1914 |
| Term End1: | 1928 |
| Office2: | Member of the Illinois House of Representatives |
| Term Start2: | 1906 |
| Term End2: | 1910 |
Frederick Bernard Roos (November 22, 1883 – May 13, 1942) was an American lawyer and businessman.
Roos was born in Chicago, Illinois. Roos was admitted to the Illinois bar in 1905 and practiced law in Chicago. Roos was also involved with the banking business. He lived in Forest Park, Illinois with his wife and family. Roos served in the Illinois House of Representatives from 1907 to 1909 and from 1911 to 1915. He also served in the Illinois Senate from 1915 to 1927. Roos was a Republican. Roos died at his home in Forest Park, Illinois.[1] [2] [3]
In 1923, Roos unsuccessfully ran for the Superior Court of Cook County.[4]