Isaac Peace Rodman (August 18, 1822 – September 30, 1862) was a Rhode Island banker, politician, and a Union Army brigadier general in the American Civil War, who was mortally wounded at the Battle of Antietam.

As well as being a politician, businessman, and banker, Isaac Rodman was a devoted Christian, a teacher of a Bible study class, and a superintendent of a Sunday school.

At the start of the Civil War, Rodman was torn between the precepts of his religion and his loyalty to the Union, but unhesitatingly raised a group of local residents for the 2nd Rhode Island Infantry Regiment and was given the rank of captain.

No one in the army had reconnoitered the proposed ford, two-thirds of a mile south of the bridge, and they found out too late that it was unusable due to its steep banks.

The corps made good progress from that point in driving west towards Sharpsburg, but at 4:00 p.m. A. P. Hill's Light Division joined the battle, launching a spirited counterattack after a rapid forced march from Harpers Ferry.