There are 64 mathematicians whose last name begin with LET.
| Letac, Gérard | Université de Clermont | 1972 |
| Letang, Delia | University of Minnesota - Twin Cities | 2009 |
| Letarte, Alan | University of Wisconsin-Madison | 1994 |
| Letarte, Bruno | Rijksuniversiteit Groningen | 2007 |
| Letcher, John | California Institute of Technology | 1966 |
| Letchford, Adam | Lancaster University | 1997 |
| Letchford, Joshua | Duke University | 2013 |
| Letchner, Julie | 2010 | |
| Letelier, Juvenal | Universidad de Chile | 2016 |
| Letelier, Patricio | Boston University | 1977 |
| Letelier Albornoz, René | Universidad Complutense de Madrid | 1989 |
| Letellier, Emmanuel | University of Sydney | 2003 |
| Letellier, Emmanuel | Université Pierre-et-Marie-Curie - Paris VI | 2003 |
| Letellier, Julie | University of Wisconsin-Milwaukee | 1991 |
| Letemplier, Julien | Université de Lille I | 2015 |
| Letendre, Patrick | Université Laval | 2018 |
| Letendre, Thomas | Université Claude Bernard Lyon 1 | 2016 |
| Leterme, Hubert | Université Grenoble Alpes | 2023 |
| Letessier, Julien | Institut National Polytechnique de Grenoble (INPG) | 2007 |
| Leth, Carl-Fredrik | Brown University | 1954 |
| Leth, John-Josef | Aalborg Universitet | 2007 |
| Leth, Steven | University of Colorado at Boulder | 1985 |
| Lethbridge, Timothy | University of Ottawa | 1994 |
| Lether, Frank | University of Utah | 1969 |
| Lethin, Richard | Massachusetts Institute of Technology | 1997 |
| Leth-Petersen, Søren | Københavns Universitet | 2003 |
| Letia, Ioan | ||
| Letiche, John | The University of Chicago | 1951 |
| Letizia, Marco | Scuola Internazionale Superiore di Studi Avanzati (SISSA) | 2017 |
| Letizia, Paolo | The Pennsylvania State University | 2012 |
| Letizia, Viviana | Université Paris IX - Dauphine | 2017 |
| Letnikow, Alexis | Universität Leipzig | 1867 |
| Letourneau, Pierre-David | Stanford University | 2013 |
| Letourneur, Romain | Université d'Orléans | 2015 |
| Letouzey, Pierre | Université Paris-Sud XI - Orsay | 2004 |
| Letrouit, Cyril | Sorbonne Université | 2021 |
| Letsch, Eckhard | Universität Leipzig | 1982 |
| Letsche, Carl | Indiana University | 1995 |
| Letscher, David | University of Michigan | 1997 |
| Letsinger, II, William | Virginia Polytechnic Institute and State University | 1995 |
| Letson, David | University of Texas at Austin | 1989 |
| Lett, Gregory | University of Colorado at Denver | 1991 |
| Letta, Giorgio | Scuola Normale Superiore di Pisa | 1959 |
| Letta, Giorgio | Università di Pisa | 1958 |
| Letteboer, Marloes | Universiteit Utrecht | 2004 |
| Lettenmeyer, Fritz | Ludwig-Maximilians-Universität München | 1918 |
| Letterhos, Zachary | Purdue University | 2021 |
| Lettinga, Gatze | Technische Universiteit Delft | 1972 |
| Lettinga, Tjeerd | Universiteit van Amsterdam | 1937 |
| Lettinga-Wijnmalen, Annaliese | Universiteit van Amsterdam | 1942 |
| Lettington, Alan | ||
| Lettington, Matthew | Cardiff University | 2008 |
| Lettl, Günter | Technische Universität Wien | 1979 |
| Lettvin, Jerome | ||
| Letuchiy, Dmytro | Kharkiv National University of Radioelectronics | 2004 |
| Letué, Frédérique | Université Paris-Sud XI - Orsay | 2000 |
| Leturcq, David | Université Grenoble Alpes | 2020 |
| Léty, Monique | Université Joseph Fourier Grenoble I | 1980 |
| Letz, Eduard | Martin-Luther-Universität Halle-Wittenberg | 1912 |
| Letz, Janina C. | University of Utah | 2020 |
| Letz, Reinhold | Technische Universität Darmstadt | 1993 |
| Letzter, Edward | University of Washington | 1988 |
| Letzter, Gail | The University of Chicago | 1987 |
| Letzter, Shoham | University of Cambridge | 2015 |