Chronology of EPA Administrators
| Administrator | Start | End |
|---|---|---|
| Jane Nishida (Acting) | 1/1/2025 | present |
| Michael S. Regan | 03/11/21 | 12/31/2024 |
| Jane Nishida (Acting) | 01/20/21 | 03/11/21 |
| Andrew Wheeler | 02/28/19 | 01/19/21 |
| Andrew Wheeler (Acting) | 07/07/18 | 02/28/19 |
| Scott Pruitt | 02/17/17 | 07/06/18 |
| Catherine McCabe (Acting) | 01/20/17 | 02/17/17 |
| Gina McCarthy | 07/19/13 | 01/20/17 |
| Bob Perciasepe (Acting) | 02/15/13 | 07/18/13 |
| Lisa P. Jackson | 01/26/09 | 02/14/13 |
| Mike Shapiro (Acting) | 01/22/09 | 01/25/09 |
| Granta Nakayama (Acting) | 01/20/09 | 01/21/09 |
| Stephen L. Johnson | 05/02/05 | 01/20/09 |
| Stephen L. Johnson (Acting) | 01/26/05 | 05/01/05 |
| Michael O. Leavitt | 11/06/03 | 01/25/05 |
| Marianne L. Horinko (Acting) | 07/12/03 | 11/05/03 |
| Linda J. Fisher (Acting) | 06/28/03 | 07/11/03 |
| Christine Todd Whitman | 01/31/01 | 06/27/03 |
| W. Michael McCabe (Acting) | 01/20/01 | 01/30/01 |
| Carol M. Browner | 01/22/93 | 01/19/01 |
| William K. Reilly | 02/06/89 | 01/20/93 |
| John Moore (Acting) | 01/21/89 | 02/05/89 |
| Lee M. Thomas | 02/08/85 | 01/20/89 |
| Lee M. Thomas (Acting) | 01/04/85 | 02/07/85 |
| William D. Ruckelshaus | 05/18/83 | 01/04/85 |
| Lee Verstandig (Acting) | 03/10/83 | 05/17/83 |
| Anne M. Gorsuch [Burford] | 05/20/81 | 03/09/83 |
| Walter Barber, Jr. (Acting) | 01/26/81 | 05/19/81 |
| Steve Jellinek (Acting) | 01/21/81 | 01/25/81 |
| Douglas M. Costle | 03/07/77 | 01/20/81 |
| John Quarles, Jr. (Acting) | 01/21/77 | 03/06/77 |
| Russell E. Train | 09/13/73 | 01/20/77 |
| Robert Fri (Acting) | 04/30/73 | 09/12/73 |
| William D. Ruckelshaus | 12/04/70 | 04/30/73 |