Quincy, IL demographics:
population, income, and more

Total population
39,109
-0.2% year-over-year change
Median household income
$56,480/yr
0.2% year-over-year change
Housing units
19,139
0.6% year-over-year change

Quincy population

How many people live in Quincy

Quincy is home to 39,109 residents, according to the most recent Census data. Gender-wise, 49% of Quincy locals are male, and 51% are female.

Total population
39,109
-0.2% year-over-year change
Gender ratio
Male
49%
19,179
Female
51%
19,930
Value Percent YoY change
Male 19,179 49% 1.8%
Female 19,930 51% -2.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Quincy is 40, with the population distributed as follows: about 17.8% are children under 15, then 13.2% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.9% of the population, while another 22.8% fall into the 45 to 64 bracket. Finally, around 20.3% are 65 or older.

Median age
39.7
Age breakdown
Under 15
17.8%
15 to 24
13.2%
25 to 44
25.9%
45 to 64
22.8%
Over 65
20.3%
Value Percent YoY change
Under 15 6,974 17.8% -2.7%
15 to 24 5,158 13.2% 7.8%
25 to 44 10,144 25.9% 0.4%
45 to 64 8,905 22.8% -4.2%
Over 65 7,928 20.3% 1.3%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Quincy, 97.9% of the population are US-born citizens, while 1.4% have gained naturalized citizenship. At the same time, 0.7% of residents are non-citizens. As for race, 86.7% of locals are Caucasian, 4.2% are African American and 1% have Asian roots. There’s also a share of 7.1% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.9%
Non-U.S.-born citizens
1.4%
Non-citizens
0.7%
Value Percent YoY change
U.S.-born citizens 38,277 97.9% -0.0%
Non-U.S.-born citizens 566 1.4% -12.2%
Non-citizens 266 0.7% 2.7%
Racial breakdown
White
86.7%
Black or African American
4.2%
American Indian and Alaska Native
0.1%
Asian
1%
Native Hawaiian and other Pacific Islander
0%
Two or more races
7.1%
Other
0.8%
Value Percent
White 33,895 86.7%
Black or African American 1,657 4.2%
American Indian and Alaska Native 47 0.1%
Asian 404 1%
Native Hawaiian and other Pacific Islander 9 0%
Two or more races 2,789 7.1%
Other 308 0.8%

Households in Quincy

A peek inside Quincy households

Quincy has 17,620 households, with an average of 2 members in each. Of these, 51.3% are families, while the remaining 48.7% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
17,620
1.0% year-over-year change
Average people per household
2
Non-family households
8,587
Family households
9,033
Value Percent YoY change
Non-family households 8,587 48.7% 3.2%
Family households 9,033 51.3% -1.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Quincy

The housing landscape of Quincy

Quincy's housing consists of 19,139 units, with 69.6% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 5.1% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 2.2% of the housing landscape.

Housing units
19,139
0.6% year-over-year change
Housing types
Value Percent
1 unit, detached 13,324 69.6%
1 unit, attached 982 5.1%
2 units 1,044 5.4%
3 or 4 units 886 4.6%
5 to 9 units 910 4.8%
10 to 19 units 618 3.2%
20 to 49 units 330 1.7%
50 or more units 633 3.3%
Mobile home 412 2.2%
Homes built since 2020
64
18.5% year-over-year change

The age of buildings in Quincy

In Quincy, the median construction year is 1959. About 26.4% of homes were built before the 1940s, with another 9.4% going up by 1949. Most development happened in the second half of the 20th century. Then, 6.4% of homes were added from 2000 to 2009, 4.4% between 2010 and 2019, and 0.3% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 5,051 26.4% -1.4%
Built between 1940 and 1949 1,797 9.4% 2.7%
Built between 1950 and 1959 2,891 15.1% -6.5%
Built between 1960 and 1969 2,566 13.4% 8.4%
Built between 1970 and 1979 2,331 12.2% 6.4%
Built between 1980 and 1989 1,200 6.3% 4.7%
Built between 1990 and 1999 1,167 6.1% -3.7%
Built between 2000 and 2009 1,221 6.4% -5.5%
Built between 2010 and 2019 851 4.4% 6.0%
Built in 2020 or later 64 0.3% 18.5%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Quincy occupancy rates

Out of the 17,620 occupied housing units in Quincy, 63.6% are owner-occupied, while 36.4% are lived in by tenants. Meanwhile, 7.9% of all homes on the local market sit vacant.

Occupied housing units
17,620
1.0% year-over-year change
Occupancy breakdown
Renter occupied
6,415
Owner occupied
11,205
Value Percent YoY
change
Renter occupied 6,415 36.4% 4.3%
Owner occupied 11,205 63.6% -0.8%
Unoccupied housing units
7.9%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Quincy housing costs

Housing costs in Quincy come to a median of $866 per month, while tenants specifically pay a median gross rent of $837.

Median housing costs per month
$866/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Quincy
$837/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Quincy

Quincy education at a glance

About 38.8% of the population in Quincy went to high school, while 23.7% pursued college studies. Another 9.2% earned an associate degree and 18% hold a bachelor’s. Meanwhile, 8.4% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 558 1.8% -1.1%
High school diploma 11,919 38.8% -3.6%
College diploma 7,262 23.7% 1.5%
Associate degree 2,817 9.2% 3.3%
Bachelor's degree 5,536 18% 2.4%
Graduate degree 2,590 8.4% 3.5%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Quincy

How much people earn in Quincy

The average annual household income in Quincy was $78,604 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2.8% change from the previous year. At the same time, the median income stood at $56,480, reflecting a +0.2% shift over the same period.

Average household income in Quincy
$78,604/year
2.9% year-over-year change
Median household income in Quincy
$56,480/year
0.2% year-over-year change

Quincy income by age

In Quincy, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $65,889. Those with someone between 45 and 64 in charge, often well established professionally, earn $73,971 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $29,250, while those led by someone over 65, many of whom may be retired, have about $41,410 in earnings. Overall, 83.4% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $29,250 -6.3%
25 - 44 $65,889 9.2%
45 - 64 $73,971 -0.0%
Over 65 $41,410 1.6%
Above poverty level
31,156
Below poverty level
6,198
Value Percent YoY
change
Above poverty level 31,156 83.4% -2.0%
Below poverty level 6,198 16.6% 7.9%

Average renter income in Quincy

To get a better sense of what renters earn on average in Quincy, their median household income was $33,429 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 30%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$33,429
Rent-to-income ratio
30%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Quincy

Workforce and job types in Quincy

The job market in Quincy is powered by 19,408 working residents, spread across a range of industries and roles. 75% of the working population are employed in professional or administrative positions, while 25% are in hands-on or service-based jobs. Also, 6% run their own businesses, 69.3% are employed by private companies, and 11% work in the public sector.

Workforce demographics

Working population
19,408
-0.3% year-over-year change
White collar
14,551
Blue collar
4,857
Value Percent YoY change
White collar 14,551 75% -0.8%
Blue collar 4,857 25% 1.3%
Employer type
Self employees
6%
Private companies
69.3%
Governmental workers
11%
Not for profit companies
13.8%
Value Percent YoY change
Self employees 1,170 6% -7.4%
Private companies 13,443 69.3% 2.0%
Governmental workers 2,127 11% -4.6%
Not for profit companies 2,668 13.8% -4.6%
Unemployment rate
4.7%
12.3% year-over-year change

Available workforce

The unemployment rate in Quincy stands at 4.7%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Quincy

How people get around in Quincy

In Quincy, the average commute time is 14 minutes. Commuting methods vary: 85.9% of residents travel by personal vehicle and 3.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
14 min
Means of transportation
Value Percent YoY change
Car 16,305 85.9% -1.6%
Taxicab 53 0.3% N/A
Bus or trolleybus 90 0.5% -37.1%
Railroad 27 0.1% 80.0%
Ferryboat 12 0.1% 0.0%
Bicycle 122 0.6% 5.2%
Walk 649 3.4% 1.9%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Quincy by zipcode?

Zipcode Population Number of households Median income Average income
62301 30,746 13,866 $52,055 $71,258
62305 19,036 7,990 $83,598 $106,820

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FAQs about Quincy demographics 

What is the total population of Quincy?

Quincy has a total population of 39,109 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.2% compared to a year ago.

What is the gender ratio in Quincy?

The gender ratio in Quincy is as follows:
  • 49% males (19,179 residents)
  • 51% females (19,930 residents)

What is the median age in Quincy?

The median age in Quincy is 39.7.

What is the age distribution of the population in Quincy?

The age distribution in Quincy is as follows:
  • Under 15: 17.8% (6,974 residents)
  • Ages 15-24: 13.2% (5,158 residents)
  • Ages 25-44: 25.9% (10,144 residents)
  • Ages 45-64: 22.8% (8,905 residents)
  • Over 65: 20.3% (7,928 residents)

What is the racial and ethnic makeup of Quincy?

The racial and ethnic makeup of Quincy is as follows:
  • White: 86.7% (33,895 residents)
  • Black or African American: 4.2% (1,657 residents)
  • American Indian and Alaska Native: 0.1% (47 residents)
  • Asian: 1% (404 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (9 residents)
  • Two or More Races: 7.1% (2,789 residents)
  • Other: 0.8% (308 residents)

What percentage of the population in Quincy are U.S.-born citizens?

U.S.-born citizens represent 97.9% of the population in Quincy.

How many housing units are there in Quincy?

There are 19,139 housing units in Quincy, reflecting a +0.6% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Quincy and what is the average household size?

Quincy has a total of 17,620 households, with an average of 2 people in each.

What is the median household income in Quincy?

Quincy has a median household income of $56,480, representing a +0.2% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Quincy?

The employment rate is 95.3% in Quincy, with a workforce of 19,408 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 75% (14,551 residents)
  • Blue-collar workers: 25% (4,857 residents)

Places of employment:
  • Self-employed: 6% (1,170 residents)
  • Private companies: 69.3% (13,443 residents)
  • Governmental workers: 11% (2,127 residents)
  • Not-for-profit companies: 13.8% (2,668 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025