John Sharpenstein Hager was an American politician from New Jersey who represented the state of California in the U.S. Senate from 1873 to 1875. He was a Democrat.
- Occupation
- politician, lawyer, judge
- Position held
- member of the State Senate of California, United States senator
- Citizenship
- United States
- Born
- March 12, 1818
- Died
- March 19, 1890
