Portage Des Sioux ZIP Code List — Saint Charles County, MO

There is one unique ZIP code in Portage Des Sioux, Missouri and it is 63373. Area code: 636.

ZIP codes

18.65

sq mi land

3.05

sq mi water

636

area code

Portage Des Sioux, MO ZIP code map

About Portage Des Sioux, MO

Portage Des Sioux, Missouri is a charming city located in Saint Charles County. This small community offers a rich historical backdrop, residing along the banks of the Mississippi River. Known for its picturesque landscapes and peaceful environment, Portage Des Sioux attracts visitors seeking a quaint getaway.

Location & geography

Portage Des Sioux is situated approximately 35 miles northwest of St. Louis, making it accessible for both residents and visitors. The city is bordered by several neighboring communities, including West Alton to the south, and is characterized by its unique terrain, which includes 18.65 square miles of land and 3.05 square miles of water. The proximity to the river provides an abundance of recreational activities and scenic views.

Community & economy

The character of Portage Des Sioux is defined by its close-knit community atmosphere and a laid-back lifestyle. While the local economy is primarily anchored in small businesses and agriculture, residents also benefit from the scenic beauty that enhances daily life. The city is a tranquil retreat that encourages outdoor activities, such as fishing and boating along the Mississippi River.

Transportation

Portage Des Sioux is accessible via Missouri Route 94, which connects to larger highways for ease of travel throughout the region. The nearest airport is the St. Louis Lambert International Airport, located approximately 45 minutes away. Public transit options are limited, but the city’s small size makes it easy to navigate by car.

History

Portage Des Sioux was founded during the westward expansion of the United States and has deep historical roots related to early American exploration. Key industries in the area have traditionally revolved around agriculture and river-related activities, reflecting the city's agricultural heritage. Notable events include its role as a point of settlement for fur traders and settlers navigating the Mississippi River.

Did you know?

One surprising fact about Portage Des Sioux is that its name is derived from French, meaning 'the portage of the Sioux.' This reflects the city's historical connections to Native American tribes and early French explorers in the region.

ZIP codes for Portage Des Sioux, MO (1)

ZIP code	City	County	Map
63373	Portage Des Sioux	Saint Charles	View map

Demographics & statistics

687

Population

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

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%
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	%
High blood pressure	30.7%
High cholesterol	35.3%
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	%
Binge drinking	19.9%
No physical activity	27.0%
Less than 7 hrs sleep	34.6%
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%
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

What is the ZIP code for Portage Des Sioux, MO?

Portage Des Sioux, MO has one ZIP code: 63373.

What is the main ZIP code for Portage Des Sioux, MO?

The primary ZIP code for Portage Des Sioux, MO is 63373. The city uses area code 636 for phone service.

What county is Portage Des Sioux, MO in?

Portage Des Sioux is located in Saint Charles County, Missouri.

How many ZIP codes are in Portage Des Sioux, MO?

Portage Des Sioux, MO has 1 ZIP code.

What is the ZIP code for the Portage Des Sioux riverfront area along the Missouri River?

The riverfront area of Portage Des Sioux, including the historic boat launch and river access points, is located in ZIP code 63373.

What ZIP code should I use when mailing correspondence to businesses in downtown Portage Des Sioux near Main Street?

All addresses in downtown Portage Des Sioux, including those on Main Street and surrounding commercial areas, use ZIP code 63373.