How can I research a Civil War prisoner of war at Johnson's Island?
Answer
You may want to start by searching the Confederate Civil War Service Records on Fold3. Fold3 is an online subscription database for military records, and you may be able to access it remotely through your public library with your library card.
Johnson's Island was a Federal Prison Camp, the majority of records from Johnson's Island are part of the United States Records of Confederate Prisoners of War, 1861-1865 at the National Archives and Records Administration. These records are also on FamilySearch. Although not name searchable, you can use the browse feature to select records from Johnson's Island and page through much like viewing microfilm.
See also: Johnson's Island POW Research: Friends and Descendents of Johnson's Island (heidelberg.edu).