Alexander Cummings McWhorter Pennington Jr. (January 8, 1838 – November 30, 1917) was an artillery officer and major general in the United States Army and a veteran of both the American Civil War and Spanish–American War.

As a member of the Independent Party representing New Jersey, Alexander Cumming McWhorter Pennington contributed to the legislative process during 2 terms in office. Alexander Cumming McWhorter Pennington’s service in Congress occurred during a significant period in American history, participating in the democratic process and representing the interests of constituents.