The city directory of Cincinnati Ohio , FS film 194005 lists post office listing in 1862, 1863, and 1864. In the 1862 the counties are listed alphabetically with the Post Offices listed alphabetically under each county. In 1863 and 1864 the post offices are listed alphaetically the county shown opposite. The name of the state is the first subdivision.
See also Bullingers Postal and Shippers Guide for the United States and Canada.