Only seven people signed both the Declaration of Independence and the US Constitution.
Here is a detailed list of the individuals who signed both the Declaration of Independence and the U.S. Constitution, including their ages on September 17, 1787, their birthplaces, their religious affiliations, the location they represented at the signing, their trade or profession, their involvement in the War of Independence, and details about their death:
George Read
Age on September 17, 1787: 54
Birthplace: Cecil County, Maryland
Religious Affiliation: Episcopalian
Represented: Delaware
Trade/Profession: Lawyer
War Involvement: Political involvement
Age at Death: 65
Date of Death: September 21, 1798
Cause of Death: Heart attack
Roger Sherman
Age on September 17, 1787: 66
Birthplace: Newton, Massachusetts
Religious Affiliation: Congregationalist
Represented: Connecticut
Trade/Profession: Lawyer, Merchant
War Involvement: Political involvement
Age at Death: 72
Date of Death: July 23, 1793
Cause of Death: Typhoid fever
Robert Morris
Age on September 17, 1787: 53
Birthplace: Liverpool, England
Religious Affiliation: Episcopalian
Represented: Pennsylvania
Trade/Profession: Merchant, Financier
War Involvement: Financier of the Revolution
Age at Death: 73
Date of Death: May 8, 1806
Cause of Death: Natural causes
Benjamin Franklin
Age on September 17, 1787: 81
Birthplace: Boston, Massachusetts
Religious Affiliation: Deist
Represented: Pennsylvania
Trade/Profession: Printer, Scientist, Diplomat
War Involvement: Diplomatic roles in France
Age at Death: 84
Date of Death: April 17, 1790
Cause of Death: Pleurisy
George Clymer
Age on September 17, 1787: 48
Birthplace: Philadelphia, Pennsylvania
Religious Affiliation: Episcopalian
Represented: Pennsylvania
Trade/Profession: Merchant, Politician
War Involvement: Continental Army Officer
Age at Death: 73
Date of Death: January 23, 1813
Cause of Death: Natural causes
James Wilson
Age on September 17, 1787: 45
Birthplace: Fife, Scotland
Religious Affiliation: Episcopalian
Represented: Pennsylvania
Trade/Profession: Lawyer
War Involvement: Political involvement
Age at Death: 55
Date of Death: August 21, 1798
Cause of Death: Stroke
John Dickinson
Age on September 17, 1787: 55
Birthplace: Talbot County, Maryland
Religious Affiliation: Quaker
Represented: Delaware
Trade/Profession: Lawyer, Politician
War Involvement: Militia service
Age at Death: 75
Date of Death: February 14, 1808
Cause of Death: Natural causes