He was appointed state treasurer of Ohio following the resignation on September 25, 1865 of G. V. Dorsey, serving until January 1866 when S. S. Warner was sworn in.
[1] After starting life as a clerk, by 1841 Hooper had become the teller of the Franklin National Bank.
The firm grew and became a successful regional wholesale dealer, but it failed in 1862 after the war caused the cutoff of sugar, molasses and other supplies from the South.
At the start of the war he was a member of Cincinnati's defense committee, and took an active role in the construction of the artillery batteries guarding the city.
[4] Toward the end of his life he was the president of the John Church Company, and the Hooper Building in Cincinnati, formerly the headquarters of that firm, is named after him.