| Party | CandidateName | DateAnnounced | BirthDate | Age |
|---|---|---|---|---|
| Democratic | Bernie Sanders | 04/30/2015 | 09/08/1941 | 77 |
| Democratic | Hillary Clinton | 04/12/2015 | 10/26/1947 | 71 |
| Democratic | Jim Webb | 07/02/2015 | 02/09/1946 | 72 |
| Democratic | Lincoln Chafee | 06/03/2015 | 03/26/1953 | 65 |
| Democratic | Martin O'alley | 05/30/2015 | 01/18/1963 | 55 |
| Green | Jill Stein | 06/22/2015 | 05/14/1950 | 68 |
| Republican | Ben Carson | 05/03/2015 | 09/18/1951 | 67 |
| Republican | Bobby Jindal | 06/24/2015 | 06/10/1971 | 47 |
| Republican | Carly Fiorina | 05/04/2015 | 09/06/1954 | 64 |
| Republican | Chris Christie | 06/30/2015 | 09/06/1962 | 56 |
| Republican | Donald Trump | 06/13/2015 | 06/14/1946 | 72 |
| Republican | George Pataki | 05/28/2015 | 06/24/1945 | 73 |
| Republican | Jeb Bush | 06/15/2015 | 02/11/1953 | 65 |
| Republican | Jim Gilmore | 07/29/2015 | 10/06/1949 | 69 |
| Republican | John Kasich | 07/21/2015 | 05/13/1952 | 66 |
| Republican | Lindsey Graham | 06/01/2015 | 07/09/1955 | 63 |
| Republican | Marco Rubio | 04/13/2015 | 05/28/1971 | 47 |
| Republican | Mike Huckabee | 05/05/2015 | 08/24/1955 | 63 |
| Republican | Rand Paul | 04/07/2015 | 01/07/1963 | 55 |
| Republican | Rick Perry | 06/04/2015 | 03/04/1950 | 68 |
| Republican | Rick Santorum | 05/27/2015 | 05/10/1958 | 60 |
| Republican | Scott Walker | 07/13/2015 | 11/02/1967 | 51 |
| Republican | Ted Cruz | 03/23/2015 | 12/22/1970 | 47 |