Henry County's naturalization records reside in part in the Probate Office, and in part in the Clerk of Courts Office. The most extensive collection is that in the Probate Office. The index that you can search on this page was compiled in the early 1900s by a courthouse employee and is available for public use.

First Papers are the applications for citizenship, Second Papers are the documents granting citizenship, and Minors entries are for applicants under the age of 18. First Papers entries marked 'C. P. A' cannot be found. It is believed that the C. P. stands for Common Pleas, and the A is volume A, but the source itself appears to be lost forever.