| Author(s) | Organisation(s) | Session |
| O Connor, Patricia | University of Oxford, United Kingdom | Poster Slam, Session, and Reception Presenter Session 7A: Short Papers Session Chair |
| Ogawa, Jun | Center for Open Data in the Humanities, Japan | Poster Slam, Session, and Reception Presenter |
| Ohge, Christopher | School of Advanced Study, University of London, United Kingdom | Session 2A: Long Papers Presenter |
| Ohmukai, Ikki | University of Tokyo, Graduate School of Humanities and Sociology; The University of Tokyo | Poster Slam, Session, and Reception Virtual Poster Session on Gather.Town |
| Okada, Kazuhiro | Hokkai Gakuen University | Poster Slam, Session, and Reception |
| Orr, Jennifer | Newcastle University, United Kingdom | Poster Slam, Session, and Reception |