A special election was held in Rhode Island's at-large congressional district on August 30, 1808 to fill a vacancy resulting from the death of Nehemiah Knight (DR) on June 13, 1808. This election was held at the same time as the 1808 elections.
Election results
Jackson took his seat on November 11, 1808. Jackson also won election to the 11th Congress at the same time.
References
Rhode Island's at-large congressional district special election, 1808 Wikipedia(Text) CC BY-SA