Northfield vs Posen

A side-by-side comparison of Northfield and Posen: population, income, housing, and more.

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

Northfield has the higher population (5,683 vs 5,331 in Posen). Northfield has the higher median household income ($180,492 vs $71,994 in Posen). Northfield has the higher median home value ($807,700 vs $172,800 in Posen).

Population, income & housing

	Northfield	Posen
Population	5,683	5,331
Median age	50.5 yrs	33.0 yrs
Median household income	$180,492	$71,994
Median home value	$807,700	$172,800
Median gross rent	$2,917	$1,478
Housing units	2,492	1,721
Homeownership rate	91.7%	71.6%
Bachelor's degree or higher	81.7%	12.8%
Unemployment rate	2.0%	5.7%

Trends (ACS 5-year, 2019–2023)

	Northfield	Posen
Population	5,534 → 5,683 (+2.7%)	6,149 → 5,331 (-13.3%)
Median household income	$148,077 → $180,492 (+21.9%)	$42,370 → $71,994 (+69.9%)
Median home value	$638,400 → $807,700 (+26.5%)	$121,100 → $172,800 (+42.7%)
Median gross rent	$2,083 → $2,917 (+40.0%)	$1,109 → $1,478 (+33.3%)

Northfield

Population

5,5345,683

Median household income

$148,077$180,492

Median home value

$638,400$807,700

Median gross rent

$2,083$2,917

Posen

Population

6,1495,331

Median household income

$42,370$71,994

Median home value

$121,100$172,800

Median gross rent

$1,109$1,478

Age & race/ethnicity

Age distribution (share)

	Northfield	Posen
Under 5	5.1%	5.1%
5 to 17	16.7%	17.7%
18 to 24	5.5%	16.9%
25 to 34	6.7%	15.6%
35 to 44	8.8%	9.6%
45 to 54	16.0%	14.9%
55 to 64	15.6%	12.9%
65 to 74	14.0%	3.9%
75 and over	11.6%	3.3%

Race & ethnicity (share)

	Northfield	Posen
White (non-Hispanic)	84.8%	18.5%
Black or African American	0.2%	18.3%
American Indian & Alaska Native	0.0%	0.0%
Asian	8.6%	0.3%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.8%	0.0%
Two or more races	3.1%	1.8%
Hispanic or Latino	2.4%	61.3%

Educational attainment (age 25+)

Share of adults 25+

	Northfield	Posen
No high school diploma	0.0%	14.7%
High school graduate	2.1%	36.6%
Some college or associate's	16.2%	35.9%
Bachelor's degree	40.7%	10.4%
Graduate or professional degree	41.0%	2.4%

Commute to work

How workers get to work (share)

	Northfield	Posen
Drove alone	54.4%	74.8%
Carpooled	5.5%	17.1%
Public transit	7.6%	1.9%
Walked	1.1%	2.0%
Bicycle	0.0%	0.0%
Worked from home	29.7%	2.1%
Other means	1.8%	2.2%

Housing

Units in structure (share)

	Northfield	Posen
1-unit, detached	73.2%	87.7%
1-unit, attached	8.9%	0.0%
2 to 4 units	1.4%	12.3%
5 to 19 units	11.4%	0.0%
20 or more units	5.2%	0.0%
Mobile home & other	0.0%	0.0%

Poverty & households

	Northfield	Posen
Poverty rate	5.2%	5.7%
Average household size	2.42	3.26
Mean commute (minutes)	27	29
Median year structure built	1968	1960