There are 15 mathematicians whose last name begin with DECA.
| Decady, Yves | Carleton University | 2000 |
| Decaestecker, Ellen | ||
| DeCampo, Raymond | Syracuse University | 1999 |
| Decamps, Marc | Katholieke Universiteit Leuven | 2005 |
| Decanini, Yves | ||
| DeCanio, Stephen | Massachusetts Institute of Technology | 1972 |
| DeCaria, Victor | University of Pittsburgh | 2019 |
| DeCarlo, Doug | University of Pennsylvania | 1998 |
| DeCarlo, Lawrence | ||
| DeCaro, Michael | Northern Illinois University | 2012 |
| Decaster, Agathe | Université Claude Bernard Lyon 1 | 2015 |
| Decatur, Scott | Harvard University | 1995 |
| Decaudin, Philippe | Université de Technologie de Compiègne | 1996 |
| Decaup, Julie | Institut de Mathématiques de Toulouse | 2018 |
| Decavèle, Dominique | University of California, Berkeley | 1971 |