| Robert I. McCarthy | |
| State Senate: | California State |
| District: | 14th |
| Term: | January 3, 1955 - January 5, 1959 |
| Preceded: | Gerald J. O'Gara |
| Succeeded: | Gene McAteer |
| State Assembly2: | California |
| District2: | 25th |
| Term2: | January 3, 1949 - January 5, 1953 |
| Preceded2: | Raymond W. Blosser |
| Succeeded2: | Daniel J. Creedon |
| Birth Name: | Robert Ignatius McCarthy |
| Birth Date: | 6 December 1920 |
| Death Place: | San Francisco, California, U.S. |
| Party: | Democratic |
| Relatives: | John F. McCarthy |
| Spouse: | Elizabeth Jane Caulfield |
| Children: | 9 |
| Alma Mater: | University of San Francisco |
| Allegiance: |  United States |
| Battles: | World War II |
Robert Ignatius McCarthy (December 6, 1920 – November 29, 2007) served in the California State Assembly for the 25th district and served as a State Senator for the 14th district.[1] During World War II he served in the United States Army.[2] His younger brother, Republican John F. McCarthy served in the Senate from 1951 to 1970.