Jefferson County vs St. Charles County

A side-by-side comparison of Jefferson County and St. Charles County: population, income, housing, and more.

Jefferson County and St. Charles County are counties in Missouri. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

St. Charles County has the higher population (409,830 vs 228,227 in Jefferson County). St. Charles County has the higher median household income ($102,912 vs $80,522 in Jefferson County). St. Charles County has the higher median home value ($296,800 vs $218,800 in Jefferson County).

Population, income & housing

	Jefferson County	St. Charles County
Population	228,227	409,830
Median age	40.2 yrs	39.6 yrs
Median household income	$80,522	$102,912
Median home value	$218,800	$296,800
Median gross rent	$972	$1,312
Housing units	93,276	164,594
Homeownership rate	81.4%	80.7%
Bachelor's degree or higher	23.6%	42.4%
Unemployment rate	3.6%	2.8%

Trends (ACS 5-year, 2019–2023)

	Jefferson County	St. Charles County
Population	223,951 → 228,227 (+1.9%)	394,290 → 409,830 (+3.9%)
Median household income	$65,454 → $80,522 (+23.0%)	$84,978 → $102,912 (+21.1%)
Median home value	$161,800 → $218,800 (+35.2%)	$219,100 → $296,800 (+35.5%)
Median gross rent	$855 → $972 (+13.7%)	$1,041 → $1,312 (+26.0%)

Jefferson County

Population

223,951228,227

Median household income

$65,454$80,522

Median home value

$161,800$218,800

Median gross rent

$855$972

St. Charles County

Population

394,290409,830

Median household income

$84,978$102,912

Median home value

$219,100$296,800

Median gross rent

$1,041$1,312

Age & race/ethnicity

Age distribution (share)

	Jefferson County	St. Charles County
Under 5	5.6%	5.5%
5 to 17	17.1%	17.3%
18 to 24	7.5%	8.1%
25 to 34	12.2%	12.4%
35 to 44	13.8%	14.1%
45 to 54	12.8%	12.5%
55 to 64	14.8%	13.5%
65 to 74	10.3%	9.8%
75 and over	5.8%	6.6%

Race & ethnicity (share)

	Jefferson County	St. Charles County
White (non-Hispanic)	89.0%	83.9%
Black or African American	1.1%	4.9%
American Indian & Alaska Native	0.1%	0.0%
Asian	1.0%	2.8%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.3%	0.3%
Two or more races	6.0%	3.9%
Hispanic or Latino	2.5%	4.0%

Educational attainment (age 25+)

Share of adults 25+

	Jefferson County	St. Charles County
No high school diploma	8.5%	4.5%
High school graduate	31.7%	22.5%
Some college or associate's	36.1%	30.5%
Bachelor's degree	16.0%	26.8%
Graduate or professional degree	7.6%	15.6%

Commute to work

How workers get to work (share)

	Jefferson County	St. Charles County
Drove alone	81.0%	76.2%
Carpooled	7.1%	5.8%
Public transit	0.1%	0.1%
Walked	0.7%	0.7%
Bicycle	0.0%	0.0%
Worked from home	10.1%	16.0%
Other means	0.9%	1.3%

Housing

Units in structure (share)

	Jefferson County	St. Charles County
1-unit, detached	79.7%	74.6%
1-unit, attached	1.7%	7.6%
2 to 4 units	3.6%	3.8%
5 to 19 units	4.0%	7.0%
20 or more units	1.4%	4.3%
Mobile home & other	9.5%	2.8%

Poverty & households

	Jefferson County	St. Charles County
Poverty rate	8.6%	4.7%
Average household size	2.60	2.54
Mean commute (minutes)	30	25
Median year structure built	1986	1994