| Robert C. Baltzell | |
| Office: | Senior Judge of the United States District Court for the Southern District of Indiana |
| Term Start: | January 19, 1950 |
| Term End: | October 18, 1950 |
| Office1: | Judge of the United States District Court for the Southern District of Indiana |
| Term Start1: | April 21, 1928 |
| Term End1: | January 19, 1950 |
| Appointer1: | operation of law |
| Predecessor1: | Seat established by 45 Stat. 437 |
| Successor1: | William Elwood Steckler |
| Office2: | Judge of the United States District Court for the District of Indiana |
| Term Start2: | January 13, 1925 |
| Term End2: | April 21, 1928 |
| Appointer2: | Calvin Coolidge |
| Predecessor2: | Albert B. Anderson |
| Successor2: | Seat abolished |
| Birth Name: | Robert Clarence Baltzell[1] |
| Birth Date: | 15 August 1879 |
| Birth Place: | Lawrence County, Illinois |
| Education: | Northern Illinois University Marion Law School (LL.B.) |
Robert Clarence Baltzell (August 15, 1879 – October 18, 1950) was a United States district judge of the United States District Court for the District of Indiana and the United States District Court for the Southern District of Indiana.
Born in Lawrence County, Illinois, Baltzell attended Northern Illinois State Normal School (now Northern Illinois University) and then received a Bachelor of Laws from Marion Law School in 1904. He was in the United States Army Reserve as a Major from 1917 to 1919. He was in private practice in Princeton, Indiana from 1904 to 1920. He was a Judge of the Gibson County Circuit Court in Princeton from 1920 to 1925.
Baltzell was nominated by President Calvin Coolidge on January 2, 1925, to a seat on the United States District Court for the District of Indiana vacated by Judge Albert B. Anderson. He was confirmed by the United States Senate on January 13, 1925, and received his commission the same day. Baltzell was reassigned by operation of law to the United States District Court for the Southern District of Indiana on April 21, 1928, to a new seat authorized by 45 Stat. 437. He assumed senior status on January 19, 1950. His service terminated on October 18, 1950, due to his death.