Andrew Hickenlooper (August 10, 1837 - May 12, 1904) was an American civil engineer, surveyor, and Union Army veteran. Born in Hudson, Ohio Hickenlooper attended St. Xavier and Woodward High School before embarking on a surveying career. He began his professional training in 1853 as a rodman in the City Engineer's Office of Cincinnati under A. W. Gilbert, then the city engineer. After Gilbert's term in office ended two years later, Hickenlooper went into business with him and formed the firm Gilbert and Hickenlooper. This firm lasted for two years, until Gilbert won another term as city engineer, at which point Hickenlooper went into business for himself. He entered military service on August 31, 1861, as captain of 'Hickenlooper's Cincinnati Battery', which was mustered into the army as the Fifth Ohio Battery of Light Artillery at the St. Louis Arsenal, Missouri. Hickenlooper spent the next four years in the Union Army and fought in the Battle of Shiloh, the Siege of Vicksburg, the Battle of Atlanta, and Sherman's March to the Sea. He also fought in the Carolina campaign and was at both Columbia and Raleigh. He eventually rose to the rank of brevet brigadier general. He was mustered out on August 31, 1865. After the war Hickenlooper returned to Cincinnati where he partnered with R. C. Phillips in the engineering and surveying firm Phillips and Hickenlooper. He was appointed United States Marshal for the Southern District of Ohio on July 7, 1866, and served until January 1871, when he resigned to become City Civil Engineer of Cincinnati. He resigned that position on May 8, 1872 to become vice president of the Cincinnati Gas, Light, and Coke Company, and rose to president on May 8, 1877. He was elected Lieutenant Governor of Ohio on October 14, 1879, and served a two-year term. Hickenlooper married Marial Lloyd Smith on February 13, 1867, with whom he had six children.