Janesville vs Lerna

A side-by-side comparison of Janesville and Lerna: population, income, housing, and more.

Janesville and Lerna are places in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Lerna has the higher population (220 vs 14 in Janesville). Since 2019, Lerna's population has grown faster (-13.0% vs -63.2%).

Population, income & housing

	Janesville	Lerna
Population	14	220
Median age	—	30.3 yrs
Median household income	—	$48,750
Median home value	—	$80,800
Median gross rent	—	$800
Housing units	14	127
Homeownership rate	100.0%	71.4%
Bachelor's degree or higher	0.0%	11.2%
Unemployment rate	0.0%	15.2%

Trends (ACS 5-year, 2019–2023)

	Janesville	Lerna
Population	38 → 14 (-63.2%)	253 → 220 (-13.0%)
Median household income	—	$43,500 → $48,750 (+12.1%)
Median home value	—	$66,200 → $80,800 (+22.1%)
Median gross rent	—	$521 → $800 (+53.6%)

Janesville

Population

3814

Lerna

Population

253220

Median household income

$43,500$48,750

Median home value

$66,200$80,800

Median gross rent

$521$800

Age & race/ethnicity

Age distribution (share)

	Janesville	Lerna
Under 5	0.0%	11.4%
5 to 17	0.0%	10.5%
18 to 24	0.0%	13.2%
25 to 34	50.0%	17.3%
35 to 44	0.0%	5.9%
45 to 54	50.0%	9.1%
55 to 64	0.0%	6.8%
65 to 74	0.0%	15.0%
75 and over	0.0%	10.9%

Race & ethnicity (share)

	Janesville	Lerna
White (non-Hispanic)	100.0%	97.3%
Black or African American	0.0%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	0.0%	2.7%
Hispanic or Latino	0.0%	0.0%

Educational attainment (age 25+)

Share of adults 25+

	Janesville	Lerna
No high school diploma	0.0%	6.3%
High school graduate	0.0%	50.3%
Some college or associate's	100.0%	32.2%
Bachelor's degree	0.0%	7.0%
Graduate or professional degree	0.0%	4.2%

Commute to work

How workers get to work (share)

	Janesville	Lerna
Drove alone	100.0%	89.2%
Carpooled	0.0%	7.2%
Public transit	0.0%	0.0%
Walked	0.0%	0.0%
Bicycle	0.0%	0.0%
Worked from home	0.0%	3.6%
Other means	0.0%	0.0%

Housing

Units in structure (share)

	Janesville	Lerna
1-unit, detached	50.0%	81.9%
1-unit, attached	0.0%	0.8%
2 to 4 units	0.0%	1.6%
5 to 19 units	0.0%	0.0%
20 or more units	0.0%	0.0%
Mobile home & other	50.0%	15.7%

Poverty & households

	Janesville	Lerna
Poverty rate	0.0%	17.0%
Average household size	2.00	2.42
Mean commute (minutes)	—	20
Median year structure built	—	1961