Henry Augustus Muhlenberg (July 21, 1823 – January 9, 1854) was an American politician and Congressman (Democratic) representing the state of Pennsylvania.
His father, Henry A. P. Muhlenberg, was a Congressman and U.S. Minister to Austria; his grandfather, Joseph Hiester, was the governor of Pennsylvania.
Muhlenberg attended Dickinson College in Carlisle, Pennsylvania.
He began Congressional service on March 4, 1853, and died less than a year later.
His son, Henry Augustus Muhlenberg, III unsuccessfully ran for Congress in 1892.