Quincy, Illinois Population 2024

38,512

Quincy is a city located in Adams County Illinois. Quincy has a 2024 population of 38,512. It is also the county seat of Adams County.Quincy is currently declining at a rate of -0.56% annually and its population has decreased by -2.28% since the most recent census, which recorded a population of 39,410 in 2020.

The average household income in Quincy is $74,111 with a poverty rate of 14.99%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Quincy is 40.5 years, 38.8 years for males, and 41.6 years for females.

Quincy Demographics

According to the most recent ACS, the racial composition of Quincy was:

  • White: 87.86%
  • Black or African American: 6.21%
  • Two or more races: 4.35%
  • Asian: 1.05%
  • Other race: 0.49%
  • Native American: 0.04%
  • Native Hawaiian or Pacific Islander: 0.01%
Land Area (mi²)
15.7 sq mi
Density (mi²)
2,451.10/sq mi
Growth Since 2020
-2.28% (-898)
The current population of Quincy, Illinois is 38,512 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 39,410.

Quincy, Illinois Population 2024

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Quincy Metro Area Population by Year

Population by Race

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Race
Population
Percentage (of total)
White34,65287.86%
Black or African American2,4486.21%
Two or more races1,7144.35%
Asian4151.05%
Other race1930.49%
Native American170.04%
Native Hawaiian or Pacific Islander20.01%
showing: 7 rows

White

Black or African American

Two or more races

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Quincy Population by Race

Quincy Population Pyramid 2024

Quincy Median Age

40.5

Total

38.8

Male

41.6

Female

Quincy Adults

There are 31,126 adults, (7,958 of whom are seniors) in Quincy.

Quincy Age Dependency

70.2

Age Dependency Ratio

34.3

Old Age Dependency Ratio

35.9

Child Dependency Ratio

Quincy Sex Ratio

Female20,43651.81%
Male19,00548.19%

Quincy Population by Age

Quincy Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All17,3732.196535
Non Family7,8441.175248
Married6,6093.0387.412.6
Female1,9553.0950.849.2
Male9652.9545.554.5
showing: 5 rows

2.95

Average Family Size

2.19

Average Household Size

65.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Quincy Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Quincy Educational Attainment by Sex (over 25)

Quincy Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 60.49%.

Quincy Educational Attainment by Race

All

Male

Female

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$41,214

Average Earnings

$46,544

Average Male

$34,156

Average Female

Quincy Earnings by Educational Attainment

Quincy Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Quincy Language

96.69% of Quincy residents speak only English, while 3.31% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.36% of the population.

Quincy Language

Quincy Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White33,2684,44113.35%
Black2,28665028.43%
Multiple1,69741724.57%
Hispanic68823834.59%
Asian362369.94%
Other18363.28%
Islander22100%
showing: 7 rows

14.99%

Overall Poverty Rate

12.24%

Male Poverty Rate

17.54%

Female Poverty Rate

Poverty in Quincy

The race most likely to be in poverty in Quincy is Islander, with 100% below the poverty level.

The race least likely to be in poverty in Quincy is Other, with 3.28% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.51%. Among those working part-time, it was 16.34%, and for those that did not work, the poverty rate was 29.53%.

Quincy Poverty

rate

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Rate
Poverty
Less Than 9th Grade30.55%
High School17.52%
Some College11.46%
Bachelors or Greater4.2%
showing: 4 rows

Quincy Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed41.65%
Male Unemployed28.99%
Female Employed7.15%
Male Employed3.59%
showing: 4 rows

Quincy Poverty Rate by Employment Status and Sex

Quincy Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Quincy Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

44.8%

Overall Marriage Rate

47.4%

Male Marriage Rate

42.4%

Female Marriage Rate

Quincy Married by Age and Sex

male

female

Quincy Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

Quincy Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Quincy Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,690

Number of Veterans

2,421

Male Veterans

269

Female Veterans

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Quincy Veterans by War

count

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Quincy Veterans by Age

count

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Quincy Veterans by Race

Quincy Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

7.78%

Veteran Poverty Rate

35.59%

Veteran Disability Rate

Quincy Veterans by Education

LaborForceParticipation

64.5%

Labor Force Participation

61.4%

Employment Rate

4.8%

Unemployment Rate

Quincy Employment by Age

LaborForceParticipation

Quincy Employment by Race

LaborForceParticipation

Quincy Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

74.27%

Born in Quincy

98.27%

Native Born

1.73%

Foreign Born

0.56%

Non Citizen

1.17%

Naturalized

Place of Birth

98.27% of Quincy residents were born in the United States, with 74.27% having been born in Illinois. 0.56% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Quincy Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202937,437-215-0.57%
202837,652-215-0.57%
202737,867-215-0.56%
202638,082-215-0.56%
202538,297-215-0.56%
202438,512-215-0.56%
202338,727-215-0.55%
202238,942-215-0.55%
202139,157-253-0.64%
202039,410-526-1.32%
201939,936-107-0.27%
201840,043-247-0.61%
201740,290-218-0.54%
201640,508-199-0.49%
201540,707-51-0.13%
201440,758-23-0.06%
201340,781-62-0.15%
201240,843-61-0.15%
201140,9041340.33%
201040,7704041%
200040,3666851.73%
199039,681-2,873-6.75%
198042,554-2,734-6.04%
197045,2881,4953.41%
196043,7932,3435.65%
195041,4509812.42%
194040,4691,2283.13%
193039,2413,2639.07%
192035,978-609-1.66%
191036,5873350.92%
190036,2524,75815.11%
189031,4944,22615.5%
188027,2683,21613.37%
187024,05210,33475.33%
186013,7186,81698.75%
18506,902
showing: 36 rows

Quincy Population by Year