63373 ZIP Code — Portage Des Sioux, MO

Saint Charles County, Missouri

ZIP code 63373 is located in Portage Des Sioux, Missouri, within Saint Charles County. It covers approximately 18.65 square miles and serves a population of 687 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 636.

About ZIP code 63373

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1960s, giving the area an established character. Median home value is $197,200. Owner-occupancy is high at 87%, well above the national average.

Median household income is $85,250. The poverty rate of 7% is below the national average. 36% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 25 minutes is near the national average.

Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of smoking (22%) compared to national benchmarks.

Overall, ZIP code 63373 reflects a community defined by high homeownership and a significant Social Security-dependent population.

687

population

18.65

sq mi land

Standard

ZIP type

Central (CT)

timezone

63373 ZIP code map

Cities in ZIP code 63373

Below are the cities the US Postal Service accepts for ZIP code 63373. Using any city not on this list may result in mail delivery delays.

City	Status
Portage Des Sioux	Acceptable
Portage Des Sioux	Preferred

Nearby ZIP codes

62028 Elsah (4.4 mi) 63301 Saint Charles (5.5 mi) 63031 Florissant (7.7 mi) 62037 Grafton (7.8 mi) 63034 Florissant (7.9 mi) 63042 Hazelwood (9.1 mi) 62022 Dow (9.2 mi) 62035 Godfrey (9.3 mi) 62013 Brussels (9.6 mi) 63386 West Alton (10.1 mi) 63044 Bridgeton (11 mi) 63033 Florissant (11 mi)

Demographics updated 05/2026

Population
Total population	687
Population density	37 / sq mi
State FIPS	29
County FIPS	183

Geography
Land area	18.65 sq mi
Water area	3.05 sq mi
Latitude	38.9235
Longitude	-90.3969
Timezone	Central (CT)
Area code	636

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	30.6%	24.9%	43.8%
$50k – $100k	25.6%	32.4%	31.5%
$100k – $200k	42.0%	33.0%	19.5%
Over $200k	1.8%	9.7%	5.2%

Demographics & statistics

687

Population

People per sq mi

45.8

Median age

$85,250

Median household income

$37,344

Per capita income

$197,200

Median home value

$1,070

Median monthly rent

87.3%

Home ownership

7.4%

Poverty rate

1.6%

Unemployment

305

Housing units

25.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	101	14.7%
18 and over	586	85.3%
65 and over	109	15.9%
Median age	45.8 years

Race & ethnicity

White 91%

Two or more races 4.1%

Hispanic or Latino 3.5%

Black or African American 1%

Asian 0.4%

Group	Count	%
White	648	91%
Two or more races	29	4.1%
Hispanic or Latino	25	3.5%
Black or African American	7	1%
Asian	3	0.4%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	30.6%	24.9%	43.8%
$50k – $100k	25.6%	32.4%	31.5%
$100k – $200k	42.0%	33.0%	19.5%
Over $200k	1.8%	9.7%	5.2%

Under $10k 4.6%

$10k–$15k 2.3%

$15k–$25k 3.1%

$25k–$35k 6.2%

$35k–$50k 14.7%

$50k–$75k 13.5%

$75k–$100k 13.1%

$100k–$150k 28.2%

$150k–$200k 0.8%

$200k+ 13.5%

Range	% of households
Under $10k	4.6%
$10k–$15k	2.3%
$15k–$25k	3.1%
$25k–$35k	6.2%
$35k–$50k	14.7%
$50k–$75k	13.5%
$75k–$100k	13.1%
$100k–$150k	28.2%
$150k–$200k	0.8%
$200k+	13.5%
Median income	$85,250

Housing

Home values

Under $50k 0.9%

$50k–$100k 6.2%

$100k–$150k 15.0%

$150k–$200k 28.8%

$200k–$300k 32.3%

$300k–$500k 16.8%

Housing overview

Metric	Value
Median home value	$197,200
Median rent / month	$1,070
Owner occupied	87.3%
Renter occupied	12.7%
Vacant	23.4%
Single-family detached	96.2%
Large apartment buildings	0.0%
Mobile homes	0.9%
Median rooms	5.4
Avg household size (owned)	2.69

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	7.7%
1990–1999	7.4%
1980–1989	6.5%
1970–1979	13.0%
1960–1969	29.3%
1950–1959	20.1%
1940–1949	0.6%
1939 or earlier	15.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.2%
1 bedroom	3.0%
2 bedrooms	21.3%
3 bedrooms	61.8%
4 bedrooms	12.7%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	15.1%
2 vehicles	37.8%
3 or more	47.1%

Heating fuel

Fuel type	%
Utility gas	3.1%
Electricity	45.9%
Propane / LP gas	47.9%
Fuel oil	1.9%
Wood	0.8%

Households & families

Household type	Count	%
Married-couple family	189	73.0%
Cohabiting couple	14	5.4%
Male householder, no spouse	42	16.2%
Female householder, no spouse	14	5.4%
Households with children under 18	68	26.3%
Households with seniors (65+)	69	26.6%
Average household size	2.65

Marital status

Status	Male	Female
Never married	24.1%	28.1%
Married	64.6%	61.7%
Separated	0.0%	0.0%
Widowed	2.1%	7.3%
Divorced	9.3%	3.0%

Education

Less than 9th grade 1.6%

Some HS, no diploma 3.0%

HS graduate 48.6%

Some college, no degree 15.0%

Associate's degree 6.3%

Bachelor's degree 13.8%

Graduate / professional 11.6%

Metric	%
HS diploma or higher	95.3%
Bachelor's or higher	25.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	12	10.1%
Kindergarten	0	0.0%
Elementary school	46	38.7%
High school	12	10.1%
College / grad school	49	41.2%

Employment

Industry of employment

Education & healthcare 25.7%

Construction 22.3%

Manufacturing 9.8%

Professional & management 9.5%

Wholesale trade 5.8%

Arts, food & hospitality 5.8%

Retail trade 5.0%

Public administration 4.5%

Other services 4.2%

Agriculture & mining 3.2%

Finance & real estate 2.4%

Transportation & utilities 1.6%

Occupation

Category	%
Management, business & arts	39.3%
Service	14.1%
Sales & office	11.1%
Natural resources & construction	19.9%
Production & transportation	15.6%

Employment type

Type	%
Private sector	66.3%
Government	17.5%
Self-employed	16.2%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	88.3%
Carpool	7.4%
Public transit	0.0%
Walk	0.5%
Work from home	3.5%
Other means	0.3%
Avg commute (minutes)	24.9

Poverty

All people 7.4%

Under 18 years 7.9%

18 and over 7.3%

Married-couple families 3.2%

Female-led households 46.2%

Income support

Source	% of households
Social Security	35.9%
Retirement income	34.0%
Supplemental Security	5.0%
Cash public assistance	1.2%
Food stamps / SNAP	5.0%

Health indicators

Condition	%
Obesity	34.5%
High blood pressure	30.7%
High cholesterol	35.3%
Diabetes	9.7%
Heart disease	6.9%
Stroke	3.2%
Asthma	9.3%
Arthritis	27.4%
Kidney disease	2.8%
Pulmonary disease	8.4%
Cancer	6.5%

Behavior / access	%
Smoking	22.3%
Binge drinking	19.9%
No physical activity	27.0%
Less than 7 hrs sleep	34.6%
Depression	24.6%
Fair or poor health	16.2%
Poor mental health	16.0%
Poor physical health	12.0%
No health insurance	15.1%
Visited doctor (checkup)	73.7%
Visited dentist	58.8%
Cholesterol screening	88.8%
Teeth loss	17.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	24	4.1%

Disability	%
Any disability	21.5%
Under 18	11.9%
18–64 years	21.2%
65 and over	32.1%

Health insurance coverage

Type	%
Private insurance	74.1%
Public insurance	29.7%
No insurance	8.3%
Uninsured under 19	4.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	648	94.3%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	679	98.8%
Born in same state	677	98.5%
Born in different state	578	84.1%
Foreign born	2	0.3%
Naturalized citizen	8	1.2%
Not a US citizen	5	62.5%

Ancestry

Ancestry	Count	%
Italian	152	22.1%
French	29	4.2%
English	17	2.5%

Ancestry	Count	%
Arab	17	2.5%
German	2	0.3%
Dutch	2	0.3%

Technology access

Metric	% of households
Computer access	37.7%
Internet access	93.8%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 63373

What city is ZIP code 63373 in?

ZIP code 63373 is primarily assigned to Portage Des Sioux, Missouri.

What county is ZIP code 63373 in?

ZIP code 63373 falls within Saint Charles County, Missouri.

Is ZIP code 63373 mostly owner-occupied?

87% of occupied units in ZIP code 63373 are owner-occupied, well above the national average.

Does ZIP code 63373 have a large retiree population?

36% of households in ZIP code 63373 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 63373?

ZIP code 63373 has an estimated population of 687 residents, with a density of 37 people per square mile.

What is the typical home value in ZIP code 63373?

The median home value in ZIP code 63373 is $197,200.

What timezone is ZIP code 63373 in?

ZIP code 63373 observes the CST timezone.