| Charles Francis Buck | |
| Term Start: | March 4, 1895 |
| Term End: | March 4, 1897 |
| Predecessor: | Robert Charles Davey |
| Successor: | Robert Charles Davey |
| State: | Louisiana |
| District: | 2nd |
| Birth Date: | November 5, 1841 |
| Birth Place: | Durrheim, Grand Duchy of Baden, Germany |
| Death Date: | January 19, 1918 |
| Death Place: | New Orleans, Louisiana, U.S. |
| Party: | Democratic |
| Profession: | Lawyer |
| Education: | Louisiana State Seminary of Learning & Military Academy |
Charles Francis Buck (November 5, 1841 – January 19, 1918) was a U.S. Representative from Louisiana.
Born in Durrheim, Grand Duchy of Baden, Germany, Buck immigrated to the United States in 1852 with his parents, who settled in New Orleans, Louisiana. He graduated from the high school of New Orleans in 1861, and then attended Louisiana State Seminary of Learning & Military Academy near Pineville, Louisiana.
Turning to the law as career, Buck studied further, was admitted to the bar in 1867, and commenced practice in New Orleans, Louisiana. He served as member of the school board of New Orleans for many years and was city attorney from 1880 to 1884.
Buck was elected as a Democrat to the Fifty-fourth Congress (March 4, 1895 - March 4, 1897). He declined to be a candidate for re-election in 1896, resuming the practice of law. He was an unsuccessful candidate for mayor of New Orleans in 1896 against Citizens' League candidate Walter C. Flower and again 1904. He served as member of the supreme court board of examiners for admission to the bar 1898-1900.
Buck died in New Orleans, Louisiana, January 19, 1918, and was interred in the Metairie Cemetery.