John C. Hall (May 21, 1821 – November 29, 1896) was an American medical doctor, politician, and Wisconsin pioneer.

He was a member of the Wisconsin State Senate, representing Green County in 1870 and 1871, and served as a Union Army surgeon in the American Civil War.

Born in Langdon, New Hampshire, Hall went to the public schools, North Yarmouth Academy, and Westbrook Seminary.

In 1891, Hall retired from the medical practice and left Wisconsin for the state of Washington.

Subsequently, during Cleveland's second term as president, Hall was appointed to the Board of Pension Examiners in Washington.