- EZRA (Wittenberg's Online Catalog)
- OhioLINK Central Catalog
- Combined catalogs of over 80 Ohio college & university libraries. Many materials found in the OhioLINK Catalog can be sent to Wittenberg users in 2-4 days at no cost to the user.
- Combined catalogs of dozens of public libraries in Ohio. Many materials in the Search Ohio can be sent to Wittenberg users in 2-4 days at no cost to the user.
- Combined catalogs of 1000s of libraries from around the world. Many books in the catalog may be requested through Inter-Library Loan.