Quincy Population

1800–2026

103.46K

2026 projection

1.8% since 2020 (increase)

020K40K60K80K100K120K18001850190019502000

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Quincy. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026103,463+2900.28%
2025103,173+5260.51%
2024102,647+6460.63%
2023102,001-970.10%
2022102,098+9510.94%
2021101,147-4890.48%
2020101,636+5570.55%
2019101,079+7660.76%
2018100,313+7800.78%
201799,533+9140.93%

Showing 10 of 38 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Quincy Demographics

38.6median age

Median age

Female39.6 yrs
Male37.6 yrs

Adults

87,356
18,123 seniors (65+) · 21% of adults69,233 other adults

Sex

Female 49.6% · 50,604Male 50.4% · 51,510

Population by age

MaleFemale85+ years, male: 75885+ years, female: 1,64380–84 years, male: 99980–84 years, female: 1,34975–79 years, male: 1,37275–79 years, female: 1,87770–74 years, male: 1,83770–74 years, female: 1,91965–69 years, male: 3,31965–69 years, female: 3,05060–64 years, male: 3,25060–64 years, female: 3,09155–59 years, male: 2,94655–59 years, female: 3,36250–54 years, male: 3,04350–54 years, female: 2,70645–49 years, male: 2,52145–49 years, female: 2,60040–44 years, male: 3,66040–44 years, female: 3,43835–39 years, male: 4,12535–39 years, female: 4,33830–34 years, male: 5,68830–34 years, female: 5,02025–29 years, male: 4,94525–29 years, female: 5,88820–24 years, male: 3,56320–24 years, female: 3,35515–19 years, male: 2,36915–19 years, female: 1,72310–14 years, male: 2,08810–14 years, female: 1,6995–9 years, male: 2,1935–9 years, female: 1,6220–4 years, male: 2,8340–4 years, female: 1,92485+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–42K2K4K4K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 1,021 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Quincy Income

$98,882median household income

Median household income

$98,882

Half of households earn more, half earn less

Median earnings

$64,871

Typical yearly pay for a worker 25 or older.

Poverty rate

10.6%

About 1 in 9 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Quincy Marital Status

44% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married44%45%43%
Never married42%44%40%
Divorced8%7%9%
Widowed4%2%6%
Separated2%2%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

14 sources

Population

American Community Survey, 2024 5-year

Additional sources