Mason County, Illinois

10 cities & places have their primary county here.

Population: 12,878
Median household income: $62,127
Median home value: $106,100

Mason County is a county in Illinois with a population of 12,878. 10 cities and places have their primary county here. At $62,127, its median household income sits below Illinois's $81,702.

Between 2019 and 2023, Mason County's population declined 5.5% from 13,621 to 12,878, while its median household income rose 28.3% from $48,417 to $62,127.

The median resident is 45.5 years old. The largest age group is 5 to 17, 15.9% of residents.

Demographics

ACS 2019–2023

Population: 12,878
Median age: 45.5 yrs
Median household income: $62,127
Median home value: $106,100
Median gross rent: $760
Housing units: 6,615
Homeownership rate: 80.6%
Bachelor's degree or higher: 17.1%
Unemployment rate: 6.1%

Trends

ACS 5-year · 2019–2023

Population

13,62112,878

Median household income

$48,417$62,127

Median home value

$83,000$106,100

Median gross rent

$664$760

Year	Population	Median household income	Median home value	Median gross rent
2019	13,621	$48,417	$83,000	$664
2020	13,486	$50,883	$87,600	$655
2021	13,225	$54,415	$86,200	$688
2022	13,074	$58,479	$97,000	$747
2023	12,878	$62,127	$106,100	$760

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 54.6%

5 to 1715.9%

18 to 246.9%

25 to 3410.8%

35 to 4411.2%

45 to 5412.5%

55 to 6415.2%

65 to 7412.8%

75 and over10.2%

	Count	Share
Under 5	598	4.6%
5 to 17	2,051	15.9%
18 to 24	885	6.9%
25 to 34	1,385	10.8%
35 to 44	1,438	11.2%
45 to 54	1,605	12.5%
55 to 64	1,953	15.2%
65 to 74	1,650	12.8%
75 and over	1,313	10.2%

Race & ethnicity

	Count	Share
White (non-Hispanic)	12,299	95.5%
Black or African American	71	0.6%
American Indian & Alaska Native	25	0.2%
Asian	15	0.1%
Native Hawaiian & Pacific Islander	0	0.0%
Some other race	0	0.0%
Two or more races	279	2.2%
Hispanic or Latino (any race)	189	1.5%

Educational attainment (age 25+)

No high school diploma7.9%

High school graduate38.1%

Some college or associate's36.9%

Bachelor's degree12.4%

Graduate or professional degree4.7%

	Count	Share
No high school diploma	740	7.9%
High school graduate	3,558	38.1%
Some college or associate's	3,451	36.9%
Bachelor's degree	1,155	12.4%
Graduate or professional degree	440	4.7%

Commute to work

Mean travel time to work: 29 min

Drove alone81.4%

Carpooled7.1%

Public transit0.2%

Walked1.5%

Bicycle0.1%

Worked from home8.2%

Other means1.6%

How workers get to work

	Count	Share
Drove alone	4,520	81.4%
Carpooled	392	7.1%
Public transit	10	0.2%
Walked	81	1.5%
Bicycle	8	0.1%
Worked from home	457	8.2%
Other means	88	1.6%

Travel time

	Count	Share
Under 15 min	1,824	35.8%
15 to 29 min	823	16.1%
30 to 44 min	968	19.0%
45 to 59 min	860	16.9%
60+ min	624	12.2%

Households

Average household size: 2.21
Poverty rate: 14.0% (1,778 of 12,681)

	Count	Share
Family households	3,432	60.1%
Nonfamily households	2,282	39.9%

Housing

Median year structure built: 1962

Occupancy

	Count	Share
Occupied	5,714	86.4%
Vacant	901	13.6%

Tenure (of occupied units)

	Count	Share
Owner-occupied	4,603	80.6%
Renter-occupied	1,111	19.4%

1-unit, detached90.1%

1-unit, attached0.7%

2 to 4 units2.4%

5 to 19 units2.8%

20 or more units0.2%

Mobile home & other3.8%

Units in structure

	Count	Share
1-unit, detached	5,962	90.1%
1-unit, attached	46	0.7%
2 to 4 units	157	2.4%
5 to 19 units	188	2.8%
20 or more units	13	0.2%
Mobile home & other	249	3.8%

Geography

County GEOID: 17125
State: Illinois
Land area: 539 sq mi
Water area: 24 sq mi
Center point: 40.2370, -89.9136

Cities & places

Compare with nearby counties

Other counties in Illinois

101