62305 ZIP Code — Quincy, IL

Adams County, Illinois

ZIP code 62305 is located in Quincy, Illinois, within Adams County. It covers approximately 139.25 square miles and serves a population of 19,473 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 217.

About ZIP code 62305

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $197,000. Owner-occupancy is high at 83%, well above the national average.

Median household income is $84,700. The poverty rate of 7% is below the national average. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 17 minutes is near the national average.

Educational attainment is near the national average, with 35% of residents holding a bachelor's degree or higher.

Overall, ZIP code 62305 reflects a community defined by high homeownership and a significant Social Security-dependent population.

19,473

population

139.25

sq mi land

Standard

ZIP type

Central (CT)

timezone

62305 ZIP code map

Cities in ZIP code 62305

Below are the cities the US Postal Service accepts for ZIP code 62305. Using any city not on this list may result in mail delivery delays.

City	Status
Quincy	Acceptable
Quincy	Preferred

Nearby ZIP codes

62301 Quincy (4 mi) 62338 Fowler (5.9 mi) 62360 Payson (7.5 mi) 63471 Taylor (11 mi) 62347 Liberty (12.1 mi) 62365 Plainville (12.2 mi) 62351 Mendon (13.3 mi) 62376 Ursa (14 mi) 62320 Camp Point (14.5 mi) 63454 Maywood (14.5 mi) 63448 La Grange (14.6 mi) 63461 Palmyra (14.6 mi)

Demographics updated 05/2026

Population
Total population	19,473
Population density	140 / sq mi
State FIPS	17
County FIPS	001

Geography
Land area	139.25 sq mi
Water area	8.09 sq mi
Latitude	39.9233
Longitude	-91.3173
Timezone	Central (CT)
Area code	217

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	30.0%	45.1%	37.2%
$50k – $100k	37.6%	33.2%	29.6%
$100k – $200k	25.1%	17.6%	24.4%
Over $200k	7.3%	4.1%	8.8%

Demographics & statistics

19,473

Population

140

People per sq mi

44.7

Median age

$84,700

Median household income

$43,409

Per capita income

$197,000

Median home value

$876

Median monthly rent

83.2%

Home ownership

7.3%

Poverty rate

2.6%

Unemployment

7,174

Housing units

34.5%

Bachelor's or higher

Age distribution

Male Female

441

Under 5

476

622

5–9

672

722

10–14

781

569

15–19

615

385

20–24

416

880

25–34

952

1,083

35–44

1,170

1,156

45–54

1,249

746

55–59

806

661

60–64

714

1,082

65–74

1,170

678

75–84

734

333

85+

360

← Male

Female →

Age summary

Group	Count	%
Under 18	4,452	22.9%
18 and over	15,021	77.1%
65 and over	4,357	22.4%
Median age	44.7 years

Race & ethnicity

White 94.7%

Black or African American 1.9%

Two or more races 1.6%

Asian 0.8%

Hispanic or Latino 0.8%

Other race 0.1%

American Indian / Alaska Native 0.1%

Group	Count	%
White	18,586	94.7%
Black or African American	378	1.9%
Two or more races	313	1.6%
Asian	165	0.8%
Hispanic or Latino	154	0.8%
Other race	14	0.1%
American Indian / Alaska Native	10	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	30.0%	45.1%	37.2%
$50k – $100k	37.6%	33.2%	29.6%
$100k – $200k	25.1%	17.6%	24.4%
Over $200k	7.3%	4.1%	8.8%

Under $10k 3.2%

$10k–$15k 0.9%

$15k–$25k 7.9%

$25k–$35k 5.4%

$35k–$50k 8.5%

$50k–$75k 17.0%

$75k–$100k 17.4%

$100k–$150k 19.5%

$150k–$200k 11.9%

$200k+ 8.3%

Range	% of households
Under $10k	3.2%
$10k–$15k	0.9%
$15k–$25k	7.9%
$25k–$35k	5.4%
$35k–$50k	8.5%
$50k–$75k	17.0%
$75k–$100k	17.4%
$100k–$150k	19.5%
$150k–$200k	11.9%
$200k+	8.3%
Median income	$84,700

Housing

Home values

Under $50k 7.2%

$50k–$100k 5.3%

$100k–$150k 15.8%

$150k–$200k 22.9%

$200k–$300k 24.4%

$300k–$500k 21.0%

$500k–$1M 3.1%

$1M+ 0.3%

Housing overview

Metric	Value
Median home value	$197,000
Median rent / month	$876
Owner occupied	83.2%
Renter occupied	16.8%
Vacant	6.8%
Single-family detached	75.8%
Large apartment buildings	1.4%
Mobile homes	10.1%
Median rooms	6.4
Avg household size (owned)	2.49

Year built

Era	%
2020 or later	0.0%
2010–2019	8.0%
2000–2009	14.5%
1990–1999	18.8%
1980–1989	9.7%
1970–1979	19.3%
1960–1969	16.0%
1950–1959	5.7%
1940–1949	1.8%
1939 or earlier	6.2%

Bedrooms

Size	% of units
No bedroom (studio)	1.5%
1 bedroom	4.5%
2 bedrooms	18.0%
3 bedrooms	46.4%
4 bedrooms	22.7%
5+ bedrooms	6.9%

Vehicles per household

Vehicles	% of households
No vehicle	2.4%
1 vehicle	26.4%
2 vehicles	44.1%
3 or more	27.1%

Heating fuel

Fuel type	%
Utility gas	53.4%
Electricity	41.4%
Propane / LP gas	3.9%
Wood	0.9%
No fuel used	0.1%

Households & families

Household type	Count	%
Married-couple family	4,588	57.8%
Cohabiting couple	527	6.6%
Male householder, no spouse	948	12.0%
Female householder, no spouse	1,869	23.6%
Households with children under 18	2,207	27.8%
Households with seniors (65+)	3,031	38.2%
Average household size	2.45

Marital status

Status	Male	Female
Never married	24.5%	22.0%
Married	67.1%	57.0%
Separated	1.0%	0.5%
Widowed	2.5%	9.5%
Divorced	4.9%	11.0%

Education

Less than 9th grade 0.4%

Some HS, no diploma 3.3%

HS graduate 30.1%

Some college, no degree 21.0%

Associate's degree 10.6%

Bachelor's degree 22.3%

Graduate / professional 12.2%

Metric	%
HS diploma or higher	96.3%
Bachelor's or higher	34.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	420	9.3%
Kindergarten	256	5.7%
Elementary school	2,091	46.4%
High school	1,105	24.5%
College / grad school	632	14.0%

Employment

Industry of employment

Education & healthcare 28.0%

Retail trade 14.6%

Manufacturing 13.4%

Arts, food & hospitality 7.7%

Professional & management 6.4%

Public administration 6.1%

Finance & real estate 5.1%

Transportation & utilities 4.3%

Construction 4.1%

Other services 3.3%

Wholesale trade 3.0%

Agriculture & mining 2.6%

Information 1.4%

Occupation

Category	%
Management, business & arts	40.2%
Service	17.7%
Sales & office	23.3%
Natural resources & construction	6.8%
Production & transportation	12.0%

Employment type

Type	%
Private sector	82.3%
Government	13.9%
Self-employed	3.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	85.8%
Carpool	5.8%
Public transit	0.8%
Walk	0.6%
Work from home	5.5%
Other means	1.4%
Avg commute (minutes)	16.7

Poverty

All people 7.3%

Under 18 years 10.0%

18 and over 6.5%

Married-couple families 0.8%

Female-led households 26.5%

Income support

Source	% of households
Social Security	35.9%
Retirement income	26.8%
Supplemental Security	2.5%
Cash public assistance	2.0%
Food stamps / SNAP	7.8%

Health indicators

Condition	%
Obesity	32.7%
High blood pressure	35.7%
High cholesterol	34.5%
Diabetes	10.1%
Heart disease	6.9%
Stroke	3.1%
Asthma	9.5%
Arthritis	28.3%
Kidney disease	3.0%
Pulmonary disease	7.2%
Cancer	7.9%

Behavior / access	%
Smoking	16.5%
Binge drinking	14.8%
No physical activity	24.1%
Less than 7 hrs sleep	30.3%
Depression	16.9%
Fair or poor health	13.3%
Poor mental health	11.9%
Poor physical health	9.7%
No health insurance	9.0%
Visited doctor (checkup)	78.0%
Visited dentist	66.1%
Cholesterol screening	91.5%
Teeth loss	12.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,194	7.9%

Disability	%
Any disability	13.6%
Under 18	5.6%
18–64 years	11.1%
65 and over	28.2%

Health insurance coverage

Type	%
Private insurance	77.0%
Public insurance	33.2%
No insurance	4.8%
Uninsured under 19	4.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	18,556	95.3%
Spanish	30	0.2%
Other Indo-European	14	0.1%
Asian & Pacific Islander	9	0.0%
Other languages	7	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	19,245	98.8%
Born in same state	19,133	98.3%
Born in different state	14,336	73.6%
Foreign born	112	0.6%
Naturalized citizen	228	1.2%
Not a US citizen	218	95.6%

Ancestry

Ancestry	Count	%
Italian	2,350	12.1%
French	2,173	11.2%
Arab	1,348	6.9%
English	216	1.1%

Ancestry	Count	%
German	70	0.4%
Polish	67	0.3%
Dutch	52	0.3%
Irish	15	0.1%

Technology access

Metric	% of households
Computer access	40.7%
Internet access	92.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 62305

What city is ZIP code 62305 in?

ZIP code 62305 is primarily assigned to Quincy, Illinois.

What county is ZIP code 62305 in?

ZIP code 62305 falls within Adams County, Illinois.

Is ZIP code 62305 mostly owner-occupied?

83% of occupied units in ZIP code 62305 are owner-occupied, well above the national average.

Does ZIP code 62305 have a large retiree population?

36% of households in ZIP code 62305 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 62305?

ZIP code 62305 has an estimated population of 19,473 residents, with a density of 140 people per square mile.

What is the typical home value in ZIP code 62305?

The median home value in ZIP code 62305 is $197,000.

What timezone is ZIP code 62305 in?

ZIP code 62305 observes the CST timezone.