Quincy Population

1840–2026

38,740

2026 projection

2.1% since 2020 (decrease)

010K20K30K40K50K1840186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual 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.
202638,740-1780.46%
202538,918+650.17%
202438,853-1460.37%
202338,999+130.03%
202238,986-3240.82%
202139,310-2540.64%
202039,564-3720.93%
201939,936-1070.27%
201840,043-2470.61%
201740,290-2180.54%

Showing 10 of 34 years.

Quincy Demographics

39.7median age

Median age

Female40.9 yrs
Male38.4 yrs

Adults

30,682
7,928 seniors · 26%22,754 other adults

Sex

Female 51% · 19,930Male 49% · 19,179

Population by age

MaleFemale85+ years, male: 53285+ years, female: 75380–84 years, male: 38380–84 years, female: 69675–79 years, male: 66875–79 years, female: 67370–74 years, male: 72470–74 years, female: 1,05665–69 years, male: 1,18165–69 years, female: 1,26260–64 years, male: 1,20660–64 years, female: 1,25655–59 years, male: 1,07855–59 years, female: 1,17950–54 years, male: 1,05150–54 years, female: 1,07845–49 years, male: 1,09745–49 years, female: 96040–44 years, male: 1,17340–44 years, female: 1,40535–39 years, male: 1,37135–39 years, female: 96130–34 years, male: 1,43230–34 years, female: 1,37025–29 years, male: 1,29625–29 years, female: 1,13620–24 years, male: 1,31120–24 years, female: 1,29215–19 years, male: 1,25015–19 years, female: 1,30510–14 years, male: 1,18410–14 years, female: 1,2115–9 years, male: 1,1565–9 years, female: 1,2430–4 years, male: 1,0860–4 years, female: 1,09485+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

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 391 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

$56,480median household income

Median household income

$56,480

Half of households earn more, half earn less

Median earnings

$45,249

Typical yearly pay for a worker 25 or older.

Poverty rate

16.7%

About 1 in 6 residents

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

Quincy Marital Status

42% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married42%44%40%
Never married35%38%31%
Divorced15%13%17%
Widowed7%4%10%
Separated2%2%2%

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

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year