Quincy is a somewhat small city located in the state of Washington. With a population of 8,315 people and two associated neighborhoods, Quincy is the 111th largest community in Washington. Quincy has seen a significant amount of newer housing growth in recent years. Quite often, new home construction is the result of new residents moving in who are middle class or wealthier, attracted by jobs, a healthy local economy, or other amenities as they leave nearby or far away areas for greener pastures. This seems to be the case in Quincy, where the median household income is $79,973.00.

The percentage of adults in Quincy who are college-educated is close to the national average for all communities of 21.84%: 17.71% of the adults in Quincy have a bachelor's degree or advanced degree.

The per capita income in Quincy in 2022 was $28,977, which is low income relative to Washington, and lower middle income relative to the rest of the US. This equates to an annual income of $115,908 for a family of four. However, Quincy contains both very wealthy and poor people as well.

Quincy is an extremely ethnically-diverse city. The people who call Quincy home describe themselves as belonging to a variety of racial and ethnic groups. People of Hispanic or Latino origin are the most prevalent group in Quincy, accounting for 77.67% of the city’s residents (people of Hispanic or Latino origin can be of any race). The greatest number of Quincy residents report their race to be White, followed by Asian. Important ancestries of people in Quincy include German, English, Norwegian, Irish, and Scandinavian.

Quincy also has a high percentage of its population that was born in another country: 27.18%.

The most common language spoken in Quincy is Spanish. Other important languages spoken here include English and African languages.