He studied classical philology and Oriental languages at the University of Halle, and from 1802 lived and worked in Weimar. For several years he was an editor of Brockhaus' Conversations-Lexikon in Altenburg (from 1812) and Leipzig. Later on in his career, he worked as private scholar in Munich.
- Works by or about Ludwig Hain at Internet Archive
- Repertorium bibliographicum at Google Books
- Supplement to Hain's Repertorium bibliographicum by Walter Arthur Copinger (1902).
- Appendices ad Hainii-Copingeri Repertorium bibliographicum by Dietrich Reichling (1914).