Trowbridge Township, MI

Township in Allegan County, MI, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

2,535

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

Median Age

36.4

years ∙ half population younger than 36.4, half older

Diversity Index

24.3%

chance two random people differ in race and ethnicity

Nativity

2.8%

foreign-born population

97.2%Native

2.8% Foreign-born

Geographic Context

Location, size, and surroundings

About

Trowbridge Township is a township in Allegan County, Michigan, United States.

Location

Township in Allegan County, MI, US

Co-ordinates

DEC42.456772° N, 85.844801° W

DMS42° 27′ 24.38″ N, 85° 50′ 41.28″ W

Population Density & area

73.27/sq mi (28.26/km²)

Total Area

35.7 sq mi (92.7 km²)

Land Area

34.6 sq mi (89.7 km²) · 96.8%

Water Area

1.1 sq mi (3 km²) · 3.2%

Demographics & Living

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

Population Composition

Key characteristics of the population

Sex Distribution

51.5% male

Male 51.5%

Female 48.5%

males per 100 females

Trowbridge Township 106.1

Allegan County 101.1

Michigan 98.2

Nativity

2.8%

foreign-born population

97.2%Native

2.8% Foreign-born

% Foreign-born

Trowbridge Township 2.8%

Allegan County 3.5%

Michigan 7.2%

Age Distribution

How the population is spread across age groups

Median Age

36.4

years ∙ half population younger than 36.4, half older

Trowbridge Township

36.4

Allegan County

Michigan

40.2

Dependency ratio

81.6

dependents per 100 working-age adults

Trowbridge Township 81.6

Allegan County 71.4

Michigan 66.3

AGE DISTRIBUTION

Distribution of age group

Median age

	Trowbridge Township	Allegan County	Michigan
Age Group
Children (Under 18)	22.2%	23.2%	21.2%
Working age (18-64)	55%	58.4%	60.2%
Senior (65+)	22.8%	18.4%	18.6%
Dependency ratio
Total dependency ratio	81.6	71.4	66.3
Child dependency ratio	40.3	39.8	35.3
Old-age dependency ratio	41.3	31.6	31

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

86.5%

Black

Asian

0.7%

Hispanic

6.4%

Other

6.4%

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

24.3%

chance two random people differ in race and ethnicity

Trowbridge Township 24.3%

Allegan County 27.5%

Michigan 45.2%

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 Trowbridge Township population

	Trowbridge Township	Allegan County	Michigan
Hispanic or Latino	6.4%	8.1%	5.9%
Mexican	5.9%	6.7%	4%
Puerto Rican	0.5%	0.3%	0.5%
Cuban	0%	0.1%	0.2%
Other Hispanic / Latino	0%	1%	1.2%
Not Hispanic or Latino	93.6%	91.9%	94.1%
One race	87.1%	87.2%	89.6%
White	86.5%	84.6%	72.4%
Black or African American	0%	1.2%	13.1%
American Indian and Alaska Native	0%	0.2%	0.3%
Asian	0.7%	0.7%	3.4%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	0%	0.5%	0.5%
Two or more races (Multiracial)	6.5%	4.7%	4.5%

Household & Families Composition

Household size, type, and family structure

Household structure

71.8% family

Family 71.8%

Non family 28.2%

% family households

Trowbridge Township 71.8%

Allegan County 72.8%

Michigan 62.4%

Average household size

2.76

persons per household

Trowbridge Township

2.76

Allegan County

2.64

Michigan

2.42

Household & Family COMPOSITION

Households

Percentage of Trowbridge Township population

	Trowbridge Township	Allegan County	Michigan
Total households	912	45,522	4,076,369
Average houshold size	2.76	2.64	2.42
Family households	655	33,119	2,545,621
Average family size	3.2	3.08	3.05
Married couple family	456	26,368	1,878,767
Other families	199	6,751	666,854
Male householder	112	2,498	199,150
Female householder	87	4,253	467,704
Non-family households	257	12,403	1,530,748
One-person households	207	9,836	1,250,418
Male householder	123	4,764	583,425
Senior (65+) living alone	49	1,732	188,594
Female householder	84	5,072	666,993
Senior (65+) living alone	37	2,996	349,637
Other living arrangements	50	2,567	280,330

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

1,009

housing units

Trowbridge Township 1,009

Allegan County 52,636

Michigan 4,622,236

Occupancy status

90.4% occupied

Occupied 90.4%

Vacant 9.6%

vacancy rate

Trowbridge Township 9.6%

Allegan County 13.5%

Michigan 11.8%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

83.4%

Single family houses

83.4%

Apartments in multi-unit structures

0.1%

Mobile homes

16.6%

Boat, RV, van, etc

Median Year Built

1973

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

Historic ∙ 1939 or earlier

15%

Postwar & mid-century ∙ 1940 - 1969

29.8%

Late 20th century ∙ 1970 - 1999

39.7%

Modern ∙ 2000 or later

15.6%

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

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Trowbridge Township	Allegan County	Michigan
Rooms per unit
Median rooms	6.6	6.2	5.9
1–3 rooms	4.7%	5.6%	10.5%
4–6 rooms	43.7%	49.9%	51.9%
7+ rooms	51.6%	44.6%	37.6%
Bedrooms
No bedroom / studio	0%	0.4%	1.6%
1 bedroom	2%	4.6%	8.9%
2 bedrooms	18.6%	20.8%	24.6%
3 bedrooms	44%	46.7%	43.5%
4+ bedrooms	35.3%	27.5%	21.4%
At a glance
Median year built	1973	1982	1972
Total housing units	1,009	52,636	4,622,236

Occupancy Profile

Who is inside and how they use it

Homeownership

86.1% owners

Renter-occupied 13.9%

Owner-occupied 86.1%

homeownership rate

Trowbridge Township 86.1%

Allegan County 87.4%

Michigan 73.2%

Average household size

2.71

Owner-occupied

3.06

Renter-occupied

owner-occupied average size

Trowbridge Township 2.71

Allegan County 2.68

Michigan 2.54

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Trowbridge Township	Allegan County	Michigan
Total occupied units	912	45,522	4,076,369
Year moved in
2020 or later	15.5%	15.8%	21%
2010 to 2019	27.4%	40.5%	39.5%
2000 to 2009	23%	18.1%	16%
1999 or earlier	34%	25.7%	23.4%
Occupants per room
1.00 or fewer	97.8%	97.7%	98.4%
1.01 to 1.50	0.3%	2%	1.2%
1.51 or more	1.9%	0.3%	0.4%
Vehicles availability
No vehicles	3.1%	2.5%	7%
1 vehicle	27.9%	27.6%	34.8%
2 vehicles	35.3%	42.8%	38.3%
3 or more vehicles	33.8%	27.2%	19.8%
House heating fuel used
Gas	71.6%	81.8%	83.6%
Electricity	6.3%	5.5%	12.1%
Solar	0%	0.2%	0%
Fuel oil, kerosene etc	6.6%	2.7%	0.8%
All other fuels	15.6%	9.3%	3%
No fuel used	0%	0.5%	0.5%
Selected characteristics
Lacking complete plumbing	0%	0.2%	0.4%
Lacking complete kitchen	0%	0.5%	0.7%
No telephone service available	1.5%	0.6%	0.7%

Housing Value

What owner-occupied units are worth

Median home value

$235,900

owner-occupied units

Median value(USD)

Trowbridge Township

$235,900

Allegan County

$267,100

Michigan

$231,600

Housing Cost Burden

21.8%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

21.8%

Owners without a mortgage

10.9%

Renters

42.1%

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

	Trowbridge Township	Allegan County	Michigan
Property value
Median Value	$235,900	$267,100	$231,600
Under $100,000	11.3%	12.4%	16.8%
$100,000 - $200,000	28.2%	19.8%	24.7%
$200,000 - $300,000	29.7%	25.8%	23.4%
$300,000 - $500,000	26.5%	29.8%	24.1%
$500,000 - $1,000,000	3.8%	9.7%	9.2%
$1,000,000 and more	0.5%	2.5%	1.6%
Owner-occupied households
With a mortgage	53.1%	56.8%	57.8%
Without a mortgage	46.9%	43.2%	42.2%
Median monthly owner costs
With a mortgage	$1,401	$1,523	$1,569
Without a mortgage	$548	$575	$602
Gross rent
Median rent	$1,119	$1,100	$1,129

Education Profile

How educated is the community and how education pays off

Adults with a college degree

9.7%

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

Trowbridge Township 9.7%

Allegan County 27.1%

Michigan 32.4%

Adults without a high school diploma

6.7%

of adults (25+) without a high school diploma

Trowbridge Township 6.7%

Allegan County 7.6%

Michigan 8%

School Enrollment

Who is enrolled in school and at what level

School enrollment

391

population (age 3+) enrolled in school

Nursery / Preschool

2.8%

K–12

80.3%

College / Undergraduate

16.9%

Graduate / Professional

College-going rate (18-24 yr olds)

14.1%

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

Trowbridge Township

14.1%

Allegan County

19%

Michigan

41.1%

Enrollment & school type

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

Population 3+ currently enrolled in a school

	Trowbridge Township	Allegan County	Michigan
Total enrolled (age 3+)	391	26,223	2,312,914
Nursery / preschool	2.8%	5.8%	5.6%
K–12	80.3%	81.3%	67.9%
Kindergarten	3.6%	7%	5.2%
Elementary: Grades 1–4	26.6%	21.9%	19.7%
Elementary: Grades 5–8	25.8%	26.4%	20.8%
High School: Grades 9–12	24.3%	26%	22.2%
College or graduate school	16.9%	12.9%	26.5%
College, undergraduate	16.9%	10.7%	21.1%
Graduate, professional school	0%	2.2%	5.4%
College-going rate · 18-24 yr olds	14.1%	19%	41.1%
School type
Public school	90.5%	84.9%	85.2%
Private school	9.5%	15.1%	14.8%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

1,796

population 25 years and over

Total adults (25+)

Less than 9th grade

2.6%

9th-12th, no diploma

4.1%

HS graduate

42.8%

Some college no degree

31.1%

Associates degree

9.7%

Bachelors degree

Graduate or professional degree

1.8%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

60.9% · 39.1%

9th-12th, no diploma

40.5% · 59.5%

HS graduate

63.5% · 36.5%

Some college no degree

41.9% · 58.1%

Associates degree

29.3% · 70.7%

Bachelors degree

50.3% · 49.7%

Graduate or professional degree

34.4% · 65.6%

Educational Attainment Overview

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

Highest credential completed · adults 25+

	Trowbridge Township	Allegan County	Michigan
Population (25+)	1,796	84,097	7,008,507
Less than 9th grade	2.6%	2.4%	2.6%
9th–12th, no diploma	4.1%	5.2%	5.4%
High school diploma or GED	42.8%	35.6%	28%
Some college, no degree	31.1%	20.9%	21.9%
Associate's degree	9.7%	8.7%	9.8%
Bachelor's degree or higher	9.7%	27.1%	32.4%
Bachelor's degree	8%	18.1%	19.7%
Graduate or professional	1.8%	9.1%	12.7%
High School or higher	93.3%	92.4%	92.1%

Earnings by education level

percentage as applicable

Median Earnings

$46,810

Median earnings for adults 25+, by level

Less than HS graduate

$71,250

HS graduate

$37,063

Some college or associates

$51,146

Bachelors degree

$39,792

Graduate or professional degree

$91,607

Poverty Rate

2.3%

for ages 25+, with bachelors degree or higher

Less than HS graduate

29.2%

HS graduate

17.2%

Some college or associates

2.6%

Bachelors degree or higher

2.3%

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Trowbridge Township	Allegan County	Michigan
Median earnings
Population 25+, with earnings	$46,810	$51,065	$50,316
Less than high school graduate	$71,250	$40,581	$31,851
High school graduate (includes equivalency)	$37,063	$43,440	$37,777
Some college or associate's degree	$51,146	$47,809	$44,844
Bachelor's degree	$39,792	$66,444	$66,893
Graduate or professional degree	$91,607	$77,610	$85,195
Poverty rates
Less than high school graduate	29.2%	20.3%	27.4%
High school graduate (includes equivalency)	17.2%	9.7%	15.2%
Some college or associate's degree	2.6%	6.1%	10.3%
Bachelor's degree or higher	2.3%	2.1%	4.2%

Insights for Trowbridge Township, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

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