In 1792, Quincy was split off from Braintree; the new town was named after Colonel John Quincy, maternal grandfather of Abigail Adams and after whom John Quincy Adams was also named.
Në vitin 1792, Quincy u nda nga Braintree; qyteti i ri u emërua nga koloneli John Quincy, gjyshi i nënës së Abigail Adams dhe pas së cilës u quajt edhe John Quincy Adams.