Harvey Abner Allen (October 17, 1818 – September 20, 1882) was an officer in the United States Army who served as the fourth commander of the Department of Alaska, from September 20, 1871 to January 3, 1873. He graduated from West Point in 1841, and was assigned to the 2nd Artillery Regiment, serving with this unit for most of his career.Allen died at his home in Schraalenburg, New Jersey (now Dumont, New Jersey) on September 20, 1882, and was buried in Green-Wood Cemetery in Brooklyn.