St. Clair, MN

City in Blue Earth County, MN, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

710

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

43.4

years ∙ half population younger than 43.4, half older

Diversity Index

24.6%

chance two random people differ in race and ethnicity

Nativity

0.7%

foreign-born population

99.3%Native

0.7% Foreign-born

Geographic Context

Location, size, and surroundings

About

St. Clair is a city within Blue Earth County, Minnesota, United States.

Location

City in Blue Earth County, MN, US

Co-ordinates

DEC44.083885° N, 93.860545° W

DMS44° 05′ 01.99″ N, 93° 51′ 37.96″ W

Population Density & area

1,094/sq mi (422.6/km²)

Total Area

0.649 sq mi (1.68 km²)

Land Area

0.649 sq mi (1.68 km²) · 100%

Water Area

0 sq mi (0 km²) · 0%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

54.5% male

Male 54.5%

Female 45.5%

males per 100 females

St. Clair 119.8

Blue Earth County 103.1

Minnesota 100.4

Nativity

0.7%

foreign-born population

99.3%Native

0.7% Foreign-born

% Foreign-born

St. Clair 0.7%

Blue Earth County 5.4%

Minnesota 8.7%

Age Distribution

How the population is spread across age groups

Median Age

43.4

years ∙ half population younger than 43.4, half older

St. Clair

43.4

Blue Earth County

31.6

Minnesota

38.8

Dependency ratio

65.1

dependents per 100 working-age adults

St. Clair 65.1

Blue Earth County 53.8

Minnesota 67.1

AGE DISTRIBUTION

Distribution of age group

Median age

	St. Clair	Blue Earth County	Minnesota
Age Group
Children (Under 18)	24.8%	19.7%	22.9%
Working age (18-64)	60.6%	65%	59.8%
Senior (65+)	14.6%	15.3%	17.3%
Dependency ratio
Total dependency ratio	65.1	53.8	67.1
Child dependency ratio	40.9	30.3	38.2
Old-age dependency ratio	24.2	23.5	28.9

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

86.5%

Black

Asian

0.3%

Hispanic

4.6%

Other

8.6%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

24.6%

chance two random people differ in race and ethnicity

St. Clair 24.6%

Blue Earth County 28.1%

Minnesota 41%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of St. Clair population

	St. Clair	Blue Earth County	Minnesota
Hispanic or Latino	4.6%	4.8%	6.4%
Mexican	3.9%	3.6%	3.9%
Puerto Rican	0%	0.2%	0.3%
Cuban	0%	0%	0.1%
Other Hispanic / Latino	0.7%	1.1%	2%
Not Hispanic or Latino	95.4%	95.2%	93.6%
One race	90.3%	91.8%	89.1%
White	86.5%	84.4%	75.9%
Black or African American	0%	4.8%	6.9%
American Indian and Alaska Native	0%	0.2%	0.7%
Asian	0.3%	2.3%	5.1%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	3.5%	0.2%	0.5%
Two or more races (Multiracial)	5.1%	3.4%	4.5%

Household & Families Composition

Household size, type, and family structure

Household structure

76.4% family

Family 76.4%

Non family 23.6%

% family households

St. Clair 76.4%

Blue Earth County 55.5%

Minnesota 62.3%

Average household size

2.8

persons per household

St. Clair

2.8

Blue Earth County

2.37

Minnesota

2.43

Household & Family COMPOSITION

Households

Percentage of St. Clair population

	St. Clair	Blue Earth County	Minnesota
Total households	254	27,606	2,307,955
Average houshold size	2.8	2.37	2.43
Family households	194	15,316	1,438,404
Average family size	3.21	2.93	3.04
Married couple family	164	11,780	1,129,003
Other families	30	3,536	309,401
Male householder	17	1,334	102,922
Female householder	13	2,202	206,479
Non-family households	60	12,290	869,551
One-person households	41	7,752	686,475
Male householder	22	4,050	320,418
Senior (65+) living alone	4	918	97,557
Female householder	19	3,702	366,057
Senior (65+) living alone	14	1,710	186,557
Other living arrangements	19	4,538	183,076

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

264

housing units

St. Clair 264

Blue Earth County 29,864

Minnesota 2,545,030

Occupancy status

96.2% occupied

Occupied 96.2%

Vacant 3.8%

vacancy rate

St. Clair 3.8%

Blue Earth County 7.6%

Minnesota 9.3%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

93.6%

Single family houses

93.6%

Apartments in multi-unit structures

5.3%

Mobile homes

1.1%

Boat, RV, van, etc

Median Year Built

1973

Half of houses were built before 1973, and half after.

Historic ∙ 1939 or earlier

22.3%

Postwar & mid-century ∙ 1940 - 1969

22.3%

Late 20th century ∙ 1970 - 1999

50.8%

Modern ∙ 2000 or later

4.6%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	St. Clair	Blue Earth County	Minnesota
Rooms per unit
Median rooms	7.2	6.1	6.1
1–3 rooms	3%	13.5%	14.9%
4–6 rooms	32.9%	43.1%	41.4%
7+ rooms	64%	43.5%	43.7%
Bedrooms
No bedroom / studio	0%	2.6%	2.7%
1 bedroom	5.7%	9.8%	11.4%
2 bedrooms	12.5%	24.1%	24.5%
3 bedrooms	29.5%	36%	32.2%
4+ bedrooms	52.2%	27.4%	29.1%
At a glance
Median year built	1973	1979	1979
Total housing units	264	29,864	2,545,030

Occupancy Profile

Who is inside and how they use it

Homeownership

94.5% owners

Renter-occupied 5.5%

Owner-occupied 94.5%

homeownership rate

St. Clair 94.5%

Blue Earth County 61.4%

Minnesota 72.2%

Average household size

2.86

Owner-occupied

1.64

Renter-occupied

owner-occupied average size

St. Clair 2.86

Blue Earth County 2.57

Minnesota 2.59

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	St. Clair	Blue Earth County	Minnesota
Total occupied units	254	27,606	2,307,955
Year moved in
2020 or later	9%	32.1%	23.8%
2010 to 2019	27.2%	36%	38.9%
2000 to 2009	22.8%	13.4%	16.1%
1999 or earlier	40.9%	18.5%	21.2%
Occupants per room
1.00 or fewer	100%	97.5%	97.7%
1.01 to 1.50	0%	1.4%	1.5%
1.51 or more	0%	1.1%	0.8%
Vehicles availability
No vehicles	0%	6.6%	6.7%
1 vehicle	17.3%	28.2%	30.8%
2 vehicles	27.2%	41.1%	39.5%
3 or more vehicles	55.5%	24%	23.1%
House heating fuel used
Gas	86.7%	76.8%	75.9%
Electricity	12.6%	20.2%	19.4%
Solar	0%	0%	0.1%
Fuel oil, kerosene etc	0%	0.5%	1.3%
All other fuels	0.8%	1.9%	2.5%
No fuel used	0%	0.6%	0.9%
Selected characteristics
Lacking complete plumbing	0%	0.6%	0.4%
Lacking complete kitchen	0%	0.9%	0.7%
No telephone service available	0%	1%	0.7%

Housing Value

What owner-occupied units are worth

Median home value

$218,000

owner-occupied units

Median value(USD)

St. Clair

$218,000

Blue Earth County

$266,700

Minnesota

$329,300

Housing Cost Burden

11.3%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

11.3%

Owners without a mortgage

18.5%

Renters

57.1%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	St. Clair	Blue Earth County	Minnesota
Property value
Median Value	$218,000	$266,700	$329,300
Under $100,000	7.9%	9.7%	7.7%
$100,000 - $200,000	30.9%	20.8%	13.3%
$200,000 - $300,000	39.6%	28.9%	22.6%
$300,000 - $500,000	20%	29.3%	36.9%
$500,000 - $1,000,000	1.7%	9.5%	17%
$1,000,000 and more	0%	1.8%	2.6%
Owner-occupied households
With a mortgage	51.7%	60%	64%
Without a mortgage	48.3%	40%	36%
Median monthly owner costs
With a mortgage	$1,663	$1,662	$1,947
Without a mortgage	$711	$660	$698
Gross rent
Median rent	$750	$1,123	$1,280

Education Profile

How educated is the community and how education pays off

Adults with a college degree

31.2%

of adults 25+ with a bachelor's degree or higher

St. Clair 31.2%

Blue Earth County 34.2%

Minnesota 39.4%

Adults without a high school diploma

0.8%

of adults (25+) without a high school diploma

St. Clair 0.8%

Blue Earth County 5.3%

Minnesota 6.1%

School Enrollment

Who is enrolled in school and at what level

School enrollment

194

population (age 3+) enrolled in school

Nursery / Preschool

3.1%

K–12

75.3%

College / Undergraduate

19.1%

Graduate / Professional

2.6%

College-going rate (18-24 yr olds)

45.5%

of 18-24-year-olds in college or graduate school

St. Clair

45.5%

Blue Earth County

62.5%

Minnesota

39.1%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	St. Clair	Blue Earth County	Minnesota
Total enrolled (age 3+)	194	22,165	1,385,086
Nursery / preschool	3.1%	4.1%	6.2%
K–12	75.3%	45.3%	69.9%
Kindergarten	0%	3.4%	5.2%
Elementary: Grades 1–4	17.5%	13.6%	20.6%
Elementary: Grades 5–8	25.3%	13%	21.7%
High School: Grades 9–12	32.5%	15.3%	22.4%
College or graduate school	21.6%	50.6%	23.9%
College, undergraduate	19.1%	46.1%	18.8%
Graduate, professional school	2.6%	4.5%	5.1%
College-going rate · 18-24 yr olds	45.5%	62.5%	39.1%
School type
Public school	97.4%	86.7%	83.3%
Private school	2.6%	13.3%	16.7%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

468

population 25 years and over

Total adults (25+)

Less than 9th grade

0.4%

9th-12th, no diploma

0.4%

HS graduate

26.5%

Some college no degree

25.6%

Associates degree

15.8%

Bachelors degree

23.3%

Graduate or professional degree

7.9%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

100% · 0%

9th-12th, no diploma

100% · 0%

HS graduate

73.4% · 26.6%

Some college no degree

46.7% · 53.3%

Associates degree

31.1% · 68.9%

Bachelors degree

45.9% · 54.1%

Graduate or professional degree

45.9% · 54.1%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	St. Clair	Blue Earth County	Minnesota
Population (25+)	468	40,881	3,923,744
Less than 9th grade	0.4%	2.4%	2.7%
9th–12th, no diploma	0.4%	2.9%	3.4%
High school diploma or GED	26.5%	24.5%	23.3%
Some college, no degree	25.6%	21.8%	19.5%
Associate's degree	15.8%	14.3%	11.8%
Bachelor's degree or higher	31.2%	34.2%	39.4%
Bachelor's degree	23.3%	23.2%	25.6%
Graduate or professional	7.9%	11%	13.8%
High School or higher	99.1%	94.7%	93.9%

Earnings by education level

percentage as applicable

Median Earnings

$54,219

Median earnings for adults 25+, by level

Less than HS graduate

$—

HS graduate

$60,500

Some college or associates

$42,188

Bachelors degree

$61,875

Graduate or professional degree

$80,625

Poverty Rate

2.1%

for ages 25+, with bachelors degree or higher

Less than HS graduate

HS graduate

9.7%

Some college or associates

8.2%

Bachelors degree or higher

2.1%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	St. Clair	Blue Earth County	Minnesota
Median earnings
Population 25+, with earnings	$54,219	$51,493	$58,615
Less than high school graduate	$—	$29,000	$36,257
High school graduate (includes equivalency)	$60,500	$44,822	$42,951
Some college or associate's degree	$42,188	$48,319	$51,845
Bachelor's degree	$61,875	$59,087	$73,301
Graduate or professional degree	$80,625	$80,708	$89,644
Poverty rates
Less than high school graduate	0%	14.2%	23.7%
High school graduate (includes equivalency)	9.7%	12.2%	12.3%
Some college or associate's degree	8.2%	11.3%	7.8%
Bachelor's degree or higher	2.1%	5.8%	3.2%

Insights for St. Clair, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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