There are 25 mathematicians whose last name begin with CIS.
| Ciscon, Lawrence | Rice University | 1993 |
| Cisewski, Jessi | The University of North Carolina at Chapel Hill | 2012 |
| Cishahayo, Canisius | Université Catholique de Louvain | 1995 |
| Cisin, Ira | The American University | 1957 |
| Cisinski, Denis-Charles | Université Paris Diderot - Paris 7 | 2002 |
| Ciska, Małgorzata | Uniwersytet Łódzki | 2012 |
| Cismas, Emanuel | Gottfried Wilhelm Leibniz Universität Hannover | 2015 |
| Cismasiu, Cristina | Babeş-Bolyai University | 1986 |
| Cisneros, Arturo | California Institute of Technology | 1973 |
| Cisneros, Jorge | University of Washington | 2022 |
| Cisneros, Sophia | University of Texas at Austin | 2011 |
| Cisneros de la Cruz, Bruno Aarón | Université de Bourgogne | 2015 |
| Cisneros-Merino, Oswaldo | University of Nevada, Las Vegas | 2022 |
| Cisneros Molina, José Luis | University of Warwick | 1999 |
| Cisneros-Molina, Myriam | University of Oxford | 2007 |
| Cisneros Parra, Joel | Georg-August-Universität Göttingen | 1972 |
| Cisotti, Umberto | Università degli Studi di Padova | 1903 |
| Cisotto, Luca | Technische Universiteit Delft | 2018 |
| Ciss, Abdoul Aziz | Université Cheikh Anta Diop | 2012 |
| Cissé, Mame Demba | Université Cheikh Anta Diop | 2018 |
| Cissée, Richard | Technische Universität Berlin | 2009 |
| Cisternas, Jaime | Princeton University | 2003 |
| Cisternas Leyton, Gonzalo | Princeton University | 2013 |
| Cisternino, Célia | Université de Liège | 2022 |
| Cisto, Carmelo | Università degli Studi di Messina | 2020 |