Answer: The Two youngest were Thomas Lynch, Jr. and Edward Rutledge who were only 26 at the time of the signing. The oldest Benjamin Franklin was 70 when he gave his signature.
Explanation: The two youngest signers of the Declaration of Independence were Thomas Lynch, Jr. and Edward Rutledge of South Carolina were both born in 1749 and were only 26 when they signed the Declaration. Most of the other signers were in their 40s and 50s. The oldest signer was Benjamin Franklin, (born 1706) 70 years old when he signed his name on the parchment.