Quincy is a city located in Adams County Illinois. Quincy has a 2024 population of 38,600. It is also the county seat of Adams County. Quincy is currently declining at a rate of -0.52% annually and its population has decreased by -2.06% since the most recent census, which recorded a population of 39,410 in 2020.
The average household income in Quincy is $76,426 with a poverty rate of 15.43%. The median age in Quincy is 40.1 years: 38.5 years for males, and 41.3 years for females.
According to the most recent ACS, the racial composition of Quincy was:
Race | Population | Percentage (of total) |
|---|---|---|
| White | 34,181 | 87.22% |
| Two or more races | 2,278 | 5.81% |
| Black or African American | 2,045 | 5.22% |
| Asian | 404 | 1.03% |
| Other race | 264 | 0.67% |
| Native American | 14 | 0.04% |
| Native Hawaiian or Pacific Islander | 2 | 0.01% |
White
Two or more races
Black or African American
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 17,451 | 2.16 | 64.8 | 35.2 |
| Non Family | 8,323 | 1.17 | 50.8 | 49.2 |
| Married | 6,341 | 3.08 | 88.2 | 11.8 |
| Female | 1,916 | 3.12 | 54.6 | 45.4 |
| Male | 871 | 2.82 | 50.3 | 49.7 |
2.99
Average Family Size
2.16
Average Household Size
64.8%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Education Attained | Count | Percentage |
|---|---|---|
| 9th to 12th Grade | 1,561 | 5.73% |
| Associates Degree | 2,523 | 9.26% |
| Bachelors Degree | 4,737 | 17.39% |
| Graduate Degree | 2,503 | 9.19% |
| High School Graduate | 9,269 | 34.04% |
| Less Than 9th Grade | 546 | 2% |
| Some College | 6,094 | 22.38% |
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 24,485 | 22,791 | 6,718 |
| Black | 1,311 | 1,209 | 118 |
| 2+ Races | 858 | 658 | 223 |
| Hispanic | 501 | 422 | 166 |
| Asian | 250 | 205 | 100 |
| Other Race | 169 | 118 | 45 |
| Native American | 14 | 8 | 0 |
| Islander | 2 | 2 | 0 |
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 40%.
All
Male
Female
Name | Average | Male | Female |
|---|---|---|---|
| Bachelors Degree | $54,511 | $59,969 | $49,963 |
| Graduate Degree | $70,147 | $85,139 | $57,835 |
| High School Graduate | $38,451 | $44,816 | $33,129 |
| Less Than 9th Grade | $34,619 | $44,938 | $33,179 |
| Overall | $43,931 | $49,365 | $36,964 |
| Some College | $39,605 | $47,559 | $32,243 |
$43,931
Average Earnings
$49,365
Average Male
$36,964
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
96.67% of Quincy residents speak only English, while 3.33% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.58% of the population.
rate
Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 32,816 | 4,513 | 13.75% |
| Black | 1,851 | 592 | 31.98% |
| Multiple | 2,259 | 447 | 19.79% |
| Hispanic | 856 | 334 | 39.02% |
| Other | 232 | 37 | 15.95% |
| Asian | 340 | 17 | 5% |
| Islander | 2 | 2 | 100% |
15.43%
Overall Poverty Rate
13.77%
Male Poverty Rate
16.96%
Female Poverty Rate
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 Asian, with 5% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 2.46%. Among those working part-time, it was 16.75%, and for those that did not work, the poverty rate was 29.9%.
rate
Rate | Poverty |
|---|---|
| Less Than 9th Grade | 31.09% |
| High School | 18.07% |
| Some College | 11.74% |
| Bachelors or Greater | 5.41% |
rate
Rate | Poverty |
|---|---|
| Female Unemployed | 39.89% |
| Male Unemployed | 37.08% |
| Female Employed | 7.74% |
| Male Employed | 5.17% |
Households
Families
MarriedFamilies
NonFamilies
Name | Median | Mean |
|---|---|---|
| Families | $80,172 | $98,732 |
| Households | $56,372 | $76,426 |
| Married Families | $96,884 | $-999,999,999 |
| Non Families | $39,835 | $50,175 |
mean
median
Married
Widowed
Divorced
Separated
NeverMarried
43.1%
Overall Marriage Rate
45.6%
Male Marriage Rate
40.7%
Female Marriage Rate
male
female
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.
Married
Widowed
Divorced
Separated
NeverMarried
Second Gulf War
First Gulf War
Vietnam
Korea
World War II
2,501
Number of Veterans
2,239
Male Veterans
262
Female Veterans
War | Veterans |
|---|---|
| Vietnam | 711 |
| Second Gulf War | 580 |
| First Gulf War | 554 |
| Korea | 326 |
| World War II | 73 |
count
Age Group | Veterans |
|---|---|
| 75+ | 894 |
| 35 to 54 | 611 |
| 65 to 74 | 475 |
| 55 to 64 | 278 |
| 18 to 34 | 243 |
count
Name | Veterans | % of Total |
|---|---|---|
| White | 2,286 | 8.33% |
| Black | 114 | 7.29% |
| 2+ Races | 57 | 5.08% |
| Other Race | 44 | 19.56% |
| Hispanic | 39 | 6.36% |
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
7.65%
Veteran Poverty Rate
36.34%
Veteran Disability Rate
LaborForceParticipation
64.1%
Labor Force Participation
61.4%
Employment Rate
4.2%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
Europe
Asia
Africa
Oceania
Latin America
North America
74.27%
Born in Quincy
98%
Native Born
2%
Foreign Born
0.66%
Non Citizen
1.34%
Naturalized
98% of Quincy residents were born in the United States, with 74.27% having been born in Illinois. 0.66% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
Year | Population | Growth | Change |
|---|---|---|---|
| 2029 | 37,588 | -203 | -0.54% |
| 2028 | 37,791 | -202 | -0.53% |
| 2027 | 37,993 | -202 | -0.53% |
| 2026 | 38,195 | -203 | -0.53% |
| 2025 | 38,398 | -202 | -0.52% |
| 2024 | 38,600 | -203 | -0.52% |
| 2023 | 38,803 | -37 | -0.1% |
| 2022 | 38,840 | -268 | -0.69% |
| 2021 | 39,108 | -302 | -0.77% |
| 2020 | 39,410 | -526 | -1.32% |
| 2019 | 39,936 | -107 | -0.27% |
| 2018 | 40,043 | -247 | -0.61% |
| 2017 | 40,290 | -218 | -0.54% |
| 2016 | 40,508 | -199 | -0.49% |
| 2015 | 40,707 | -51 | -0.13% |
| 2014 | 40,758 | -23 | -0.06% |
| 2013 | 40,781 | -62 | -0.15% |
| 2012 | 40,843 | -61 | -0.15% |
| 2011 | 40,904 | 134 | 0.33% |
| 2010 | 40,770 | 0 | 0% |
| 2000 | 40,366 | 685 | 1.73% |
| 1990 | 39,681 | -2,873 | -6.75% |
| 1980 | 42,554 | -2,734 | -6.04% |
| 1970 | 45,288 | 1,495 | 3.41% |
| 1960 | 43,793 | 2,343 | 5.65% |
| 1950 | 41,450 | 981 | 2.42% |
| 1940 | 40,469 | 1,228 | 3.13% |
| 1930 | 39,241 | 3,263 | 9.07% |
| 1920 | 35,978 | -609 | -1.66% |
| 1910 | 36,587 | 335 | 0.92% |
| 1900 | 36,252 | 4,758 | 15.11% |
| 1890 | 31,494 | 4,226 | 15.5% |
| 1880 | 27,268 | 3,216 | 13.37% |
| 1870 | 24,052 | 10,334 | 75.33% |
| 1860 | 13,718 | 6,816 | 98.75% |
| 1850 | 6,902 | -30,686 | -81.64% |