Frankfort vs Plainfield

A side-by-side comparison of Frankfort and Plainfield: population, income, housing, and more.

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

Plainfield has the higher population (45,705 vs 20,417 in Frankfort). Frankfort has the higher median household income ($153,714 vs $142,265 in Plainfield). Frankfort has the higher median home value ($461,600 vs $398,000 in Plainfield).

Population, income & housing

	Frankfort	Plainfield
Population	20,417	45,705
Median age	41.8 yrs	37.3 yrs
Median household income	$153,714	$142,265
Median home value	$461,600	$398,000
Median gross rent	$2,175	$1,889
Housing units	6,922	14,499
Homeownership rate	94.7%	88.7%
Bachelor's degree or higher	59.2%	54.9%
Unemployment rate	3.6%	3.7%

Trends (ACS 5-year, 2019–2023)

	Frankfort	Plainfield
Population	18,999 → 20,417 (+7.5%)	43,110 → 45,705 (+6.0%)
Median household income	$139,145 → $153,714 (+10.5%)	$130,614 → $142,265 (+8.9%)
Median home value	$384,900 → $461,600 (+19.9%)	$319,500 → $398,000 (+24.6%)
Median gross rent	$1,240 → $2,175 (+75.4%)	$1,795 → $1,889 (+5.2%)

Frankfort

Population

18,99920,417

Median household income

$139,145$153,714

Median home value

$384,900$461,600

Median gross rent

$1,240$2,175

Plainfield

Population

43,11045,705

Median household income

$130,614$142,265

Median home value

$319,500$398,000

Median gross rent

$1,795$1,889

Age & race/ethnicity

Age distribution (share)

	Frankfort	Plainfield
Under 5	5.4%	5.8%
5 to 17	24.1%	24.0%
18 to 24	6.0%	7.7%
25 to 34	6.6%	8.9%
35 to 44	12.1%	15.7%
45 to 54	15.1%	17.8%
55 to 64	15.1%	10.3%
65 to 74	9.6%	6.0%
75 and over	6.0%	3.8%

Race & ethnicity (share)

	Frankfort	Plainfield
White (non-Hispanic)	78.6%	68.8%
Black or African American	10.8%	8.4%
American Indian & Alaska Native	0.0%	0.2%
Asian	2.6%	9.3%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.4%
Two or more races	2.4%	3.0%
Hispanic or Latino	5.5%	10.0%

Educational attainment (age 25+)

Share of adults 25+

	Frankfort	Plainfield
No high school diploma	1.7%	4.6%
High school graduate	15.8%	15.4%
Some college or associate's	23.3%	25.2%
Bachelor's degree	34.2%	36.0%
Graduate or professional degree	25.0%	18.9%

Commute to work

How workers get to work (share)

	Frankfort	Plainfield
Drove alone	71.8%	70.6%
Carpooled	3.3%	4.5%
Public transit	4.3%	1.6%
Walked	0.3%	0.4%
Bicycle	0.0%	0.1%
Worked from home	19.4%	21.3%
Other means	0.9%	1.5%

Housing

Units in structure (share)

	Frankfort	Plainfield
1-unit, detached	81.7%	79.1%
1-unit, attached	13.9%	12.6%
2 to 4 units	2.0%	2.0%
5 to 19 units	2.1%	3.0%
20 or more units	0.1%	3.2%
Mobile home & other	0.2%	0.2%

Poverty & households

	Frankfort	Plainfield
Poverty rate	4.4%	4.1%
Average household size	3.08	3.20
Mean commute (minutes)	33	34
Median year structure built	2000	2003