There are 64 mathematicians whose last name begin with RIO.
| Rio, Anna | Universidad de Barcelona | 1996 |
| Rio, Emmanuel | Université Paris-Sud XI - Orsay | 1990 |
| Rio, Miguel | ||
| Rio, Sheldon | Oregon State University | 1959 |
| Riolo, Rick | University of Michigan | 1988 |
| Riolo, Stefano | Università di Pisa | 2017 |
| Río-Martín, Laura | Universidade da Coruña | 2020 |
| Rion, Kevin | Bowling Green State University | 2011 |
| Riondato, Matteo | Brown University | 2014 |
| Rionero, Salvatore | Università degli Studi di Napoli Federico II | 1955 |
| Riopel, Diane | ||
| Riordan, James | University of Minnesota - Twin Cities | 1997 |
| Riordan, Jennifer | Rensselaer Polytechnic Institute | 1998 |
| Riordan, Michael | University of California, Berkeley | 1981 |
| Riordan, Oliver | University of Cambridge | 1998 |
| Riordan, Robert | Louisiana State University | 1986 |
| Riordan, William | The University of Chicago | 1955 |
| Riordon, J. | Imperial College London | 1967 |
| Rios, Andres | University of Miami | 1994 |
| Rios, Anthony | University of Kentucky | 2018 |
| Rios, Arturo | Pontifícia Universidade Católica do Rio de Janeiro | 1991 |
| Rios, Cristian | University of Minnesota - Twin Cities | 2001 |
| Rios, David | Columbia University | 2001 |
| Rios, Francisco | Dalhousie University | 2021 |
| Rios, Gabriel Emiliano | Pontifícia Universidade Católica do Rio de Janeiro | 1997 |
| Rios, Gilberto | Universität Zürich | 1923 |
| Rios, Hélène | Université Montpellier II | 1978 |
| Rios, Isabel | Instituto de Matemática Pura e Aplicada | 1998 |
| Rios, Marcos | Universidade Federal de Minas Gerais | 2001 |
| Rios, Maria Paula | The University of Chicago | 2012 |
| Rios, Miguel | University of Ottawa | 2000 |
| Rios, Nicholas | The Pennsylvania State University | 2022 |
| Rios, Noelia | Universidad Nacional de La Plata | 2018 |
| Rios, Pedro Paulo | Centro Brasileiro de Pesquisas Fisicas | 2000 |
| Rios, Riverson | University of Ottawa | 1998 |
| Rios, Vinicio | Louisiana State University | 2005 |
| Ríos, Alejandro | ||
| Ríos, Jesús | Universidad Rey Juan Carlos | 2006 |
| Ríos, Ricardo | Université Paris-Sud XI - Orsay | 1996 |
| Ríos Castro, Luis | Universidad Autónoma de Zacatecas | 2018 |
| Rios-Doria, Daniel | Arizona State University | 2010 |
| Ríos García, Sixto | Universidad Complutense de Madrid | 1940 |
| Ríos Insua, Sixto | Universidad Complutense de Madrid | 1980 |
| Ríos-Insúa, David | University of Leeds | 1990 |
| Rios-Mercado, Roger | University of Texas at Austin | 1997 |
| Ríos Montes, José | Universidad Nacional Autónoma de México (UNAM) | 1989 |
| Rios Patiño, Richard | Universidad Nacional de Colombia | 2017 |
| Rios Patiño, Richard | Université de Rennes 1 | 2017 |
| Rios Rodriguez, Alfredo | Rutgers University, New Brunswick | 2004 |
| Ríos-Rull, José | University of Minnesota - Twin Cities | 1990 |
| Rios-Solis, Yasmin Agueda | Université Pierre-et-Marie-Curie - Paris VI | 2007 |
| Rios-Soto, Karen | Cornell University | 2008 |
| Ríos Wilson, Martín | Universidad de Chile | 2021 |
| Ríos Wilson, Martín | Aix-Marseille Université | 2021 |
| Rios-Zertuche, Rodolfo | Princeton University | 2012 |
| Riotto, Antonio | Scuola Internazionale Superiore di Studi Avanzati (SISSA) | 1995 |
| Riou, Jérémie | Université Victor Segalen Bordeaux 2 | 2013 |
| Riou, Joel | Université Paris Diderot - Paris 7 | 2006 |
| Rioublanc, Stéphanie | 2005 | |
| Riou-Durand, Lionel | Institut Polytechnique de Paris | 2019 |
| Rioul, Olivier | Télécom ParisTech | 1993 |
| Rioux, Jacques | Cornell University | 1987 |
| Rioux, Julien | University of Toronto | 2012 |
| Rioux-Damidau, Françoise | Université Pierre-et-Marie-Curie - Paris VI | 1967 |