There are 29 mathematicians whose last name begin with SSIA.
| Sia, Charmaine | Harvard University | 2015 |
| Sia, Gretel | University of Hawaii | 2015 |
| Siad, Artane | University of Toronto | 2021 |
| Siadat, M. Vali | University of Illinois at Chicago | 1990 |
| Siadat, M. Vali | University of Illinois at Chicago | 1997 |
| Siagiova, Jana | Slovak Institute of Technology | 2002 |
| Siahvashi, Ali | Macquarie University | 2021 |
| Siakalli, Michailina | University of Sheffield | 2009 |
| Sial, Maqbool | University of Wisconsin-Madison | 1989 |
| Sialm, Clemens | Stanford University | 2001 |
| Sialounas, Georgios | University of Reading | 2022 |
| Siambis, John | University of California, Berkeley | 1965 |
| Siami, Milad | Lehigh University | 2017 |
| Siamitros, Christos | Brunel University | 2004 |
| Siandra, Eduardo | University of California, Los Angeles | 1991 |
| Sianesi, Barbara | University College London | 2002 |
| Siangphoe, Umaporn | Virginia Commonwealth University | 2015 |
| Siap, Irfan | The Ohio State University | 1999 |
| Siapas, Athanassios | Massachusetts Institute of Technology | 1996 |
| Siapoutis, Nikolas | The Pennsylvania State University | 2022 |
| Siar, Najoua | Università della Calabria | 2022 |
| Siar, Najoua | Ibn Tofail University | 2022 |
| Sias, Carlo | Università di Pisa | 2008 |
| Sias, Mark | University of the Witwatersrand | 2021 |
| Siassi, Nawid | European University Institute, Firenze | 2011 |
| Siauciunas, Darius | Vilniaus universitetas | 2004 |
| Šiaulys, Jonas | Vilniaus universitetas | 1988 |
| Siavoshi, Mohammad Ali | Shahid Chamran University of Ahvaz | 2012 |
| Siavvas, Miltiadis | Imperial College London | 2019 |