| John Isaac Friedman | |
| Office: | Louisiana State Representative for Natchitoches Parish |
| Term Start: | 1944 |
| Term End: | 1948 |
| Preceded: | Three-member district: C. Chaplin Jr. E. E. Hammett P. A. Sompayrae |
| Succeeded: | Three-member district: Upshur P. Breazeale Phanor O. Cox Dr. John J. Kelly |
| Office2: | Louisiana State Senator from Natchitoches and Red River parishes |
| Term Start2: | 1922 |
| Term End2: | 1924 |
| Preceded2: | Charles Milton Cunningham |
| Succeeded2: | G. F. Thomas |
| Birth Date: | 1877 |
| Birth Place: | Natchitoches Parish, Louisiana, US |
| Death Date: | 1949 |
| Death Place: | New Orleans, Louisiana, US |
| Resting Place: | Jewish Cemetery in Natchitoches, Louisiana |
| Relations: | Leon Friedman (brother) Sylvan Friedman (nephew) |
| Party: | Democrat |
John Isaac Friedman, known as J. Isaac Friedman (October 1871 - December 11, 1949),[1] was an American politician who served in the Louisiana House of Representatives from 1908 to 1916[2] and in the Louisiana State Senate from 1922 to 1924 following the resignation of Charles Milton Cunningham.[3] He represented the Democratic Party.