| Post: | United States Deputy Secretary |
| Body: | Transportation |
| Flag: | Flag of the United States Deputy Secretary of Transportation.svg |
| Flagsize: | 130 |
| Flagcaption: | Flag of the Deputy Secretary |
| Insignia: | United States Department of Transportation seal.svg |
| Insigniasize: | 120 |
| Insigniacaption: | Seal of the Department |
| Incumbent: | Polly Trottenberg |
| Incumbentsince: | April 14, 2021 |
| Department: | United States Department of Transportation |
| Style: | Madam Deputy Secretary |
| Member Of: | the United States Cabinet |
| Reports To: | United States Secretary of Transportation |
| Seat: | Washington, D.C. |
| Appointer: | The President of the United States |
| Appointer Qualified: | with Senate advice and consent |
| Termlength: | No fixed term |
| First: | Darrell M. Trent |
| Salary: | Executive Schedule, level II |
The deputy secretary of transportation advises and assists the secretary of transportation in the supervision and direction of the Department of Transportation (DOT). The deputy secretary would succeed the secretary in his or her absence, sickness, or unavailability.
| Image | Name | Term began | Term ended | President served | ||
|---|---|---|---|---|---|---|
| 1 | Darrell M. Trent | 1981 | 1983 | Ronald Reagan | ||
| 2 | James H. Burnley IV | 1983 | December 3, 1987 | |||
| 3 | Mimi Weyforth Dawson | December 3, 1987 | January 20, 1989 | |||
| 4 | Elaine Chao | April 19, 1989 | October 18, 1991 | George H. W. Bush | ||
| 5 | James B. Busey IV | December 4, 1991 | February 21, 1992[1] | |||
| 6 | Mortimer L. Downey | May 28, 1993 | January 20, 2001 | Bill Clinton | ||
| 7 | Michael Peter Jackson | May 5, 2001 | August 28, 2003 | George W. Bush | ||
| 8 | Maria Cino | May 6, 2005 | March 3, 2007 | |||
| 9 | Thomas J. Barrett | June 1, 2007 | May 1, 2009 | George W. Bush Barack Obama | ||
| 10 | John Porcari | June 1, 2009 | December 27, 2013 | Barack Obama | ||
| 11 | Victor Mendez | bgcolor=#E6E6AA | December 27, 2013 | bgcolor=#E6E6AA | July 24, 2014 | |
| July 24, 2014 | January 20, 2017 | |||||
| 12 | Jeffrey A. Rosen | May 18, 2017 | May 21, 2019 | Donald Trump | ||
| – | Steven G. Bradbury (acting) | September 10, 2019 | January 20, 2021 | |||
| 13 | Polly Trottenberg | April 14, 2021 | Incumbent | Joe Biden |