There are 31 mathematicians whose last name begin with SIER.
| Sieracki, Jeffrey | University of Maryland College Park | 2002 |
| Sieradski, Allan | University of Michigan | 1967 |
| Sierag, Dirk | Vrije Universiteit Amsterdam | 2017 |
| Sierakowski, Adam | Københavns Universitet | 2009 |
| Sierakowski, Michał | Uniwersytet Warszawski | 2008 |
| Sierevogel, Lisette | Technische Universiteit Delft | 1998 |
| Sierhuis, Maarten | Universiteit van Amsterdam | 2001 |
| Siering, Ernst | Johannes Gutenberg-Universität Mainz | 1975 |
| Sierksma, Gerard | Rijksuniversiteit Groningen | 1977 |
| Siero, Eric | Universiteit Leiden | 2016 |
| Sierocinski, Thomas | Université de Rennes 1 | 2008 |
| Sierpiński, Wacław | Uniwersytet Jagielloński | 1906 |
| Sierra, Alex | Universidade de São Paulo | 2017 |
| Sierra, Carles | Universitat Politècnica de Catalunya | 1989 |
| Sierra, Gerardo | ||
| Sierra, Germán | Universidad Complutense de Madrid | 1981 |
| Sierra, Ismael | University of Cambridge | 2023 |
| Sierra, Jesus | King Abdullah University of Science and Technology | 2018 |
| Sierra, Kian | Universidad de Málaga | 2018 |
| Sierra, Kian | Itä-Suomen yliopisto | 2018 |
| Sierra, Susan | University of Michigan | 2008 |
| Sierra Altamiranda, Alvaro | University of South Florida | 2019 |
| Sierra Arroyo, Willy | Pontificia Universidad Católica de Chile | 2010 |
| Sierra Carrizo, José María | Universidad de La Laguna | 1986 |
| Sierra-Cavazos, Jorge | North Carolina State University | 1992 |
| Sierra García, José Carlos | Universidad Complutense de Madrid | 2004 |
| Siersdorfer, Stefan | Universität des Saarlandes | 2005 |
| Siersma, Dirk | Universiteit van Amsterdam | 1974 |
| Siersma, J. Dirk | Rijksuniversiteit Groningen | 1979 |
| Siertsema, Lodewijk | Rijksuniversiteit Groningen | 1890 |
| Sierżęga, Mikołaj | University of Warwick | 2012 |