Henry Slicer (March 27, 1801 – April 23, 1874) was an American Methodist minister who served as Chaplain of the Senate for three separate terms.

[1] During his youth he worked for a time as a painter of furniture while he studied for the ministry.

The unfortunate duel on February 24, 1838, at the Bladensburg dueling grounds, between two Congressmen, Jonathan Cilley and William J. Graves, resulting in Cilley’s death, brought forth a sermon by Slicer that greatly influenced Congressional legislation banning dueling in the District of Columbia.

Following his third term as Senate Chaplain he served in Baltimore and in Frederick, Maryland.

[4] On April 3, 1827, in Baltimore, Slicer married Elizabeth (“Eliza”) C. Roberts.