Author & Contributor Index
- O'Donohue, William Thomas
- O'Donovan, Kevin Vincent
- Odor, Anna Frances
- O'Dowd, Bing
- O'Dowd, David
- O'dowd, Katherine
- Oduho, George William
- Odum, Eugene Pleasants
- Odunuga, Samson Olusikunanu
- Odusanya, Tobi
- O'Dwyer, Ian J.
- O'Dwyer, Mick
- Oebker, N.F.
- Oehlerts, Donald E.
- Oehlschlaeger, Fritz H.
- Oehlschlaeger-Garvey, Barbara
- Oehmke, Richard Wallace
- Oehrle, Stuart
- Oehrli, Jo Angela
- Oelgoetz, Megan
- Oelheim, Linda
- Oelke, Merritt Charles
- Oelschlager, Maci
- Oelschlager, Maci L.
- Oelschlager, Maci Lyn
- Oelze, Michael
- Oelze, Michael L.
- Oemisch, Mary E.
- Oerther, Daniel Barton
- Oertle, Kathleen Marie
- Oeschger, Raphael
- Oesch, Tyler Scott
- Oester, Dean Alan
- Oestereicher, Emil
- Oesterling, H. C.
- Oestrike, Richard Wilson, Jr.
- Oetting, Amy Nicole
- Oetting, George David
- Oezer, Tuna
- Ofafa, Gorretty Awuor
- O'Fallon, John Robert
- O'Fallon, Nancy Marie McCumber
- Offenberger, Spencer
- Offenstein, Tim
- Offer, Olivia
- Office of Continuing Education, University of Illinois at Urbana-Champaign
- Office of Sustainability, Office of the Vice Chancellor for Public Engagement, University of Illinois at Urbana-Champaign
- Office of Water Resources, Illinois Department of Natural Resources
- Offner, David Henry
- Offord, Derek