48191 ZIP Code — Willis, MI

Washtenaw County, Michigan

ZIP code 48191 is located in Willis, Michigan, within Washtenaw County. It covers approximately 16.12 square miles and serves a population of 4,059 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 734.

About ZIP code 48191

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $253,000. Owner-occupancy is high at 92%, well above the national average.

The gap between median ($102,784) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average. 39% 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 28 minutes is near the national average.

Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.

Overall, ZIP code 48191 reflects a community defined by high homeownership and a significant Social Security-dependent population.

4,059

population

16.12

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

48191 ZIP code map

Cities in ZIP code 48191

Below are the cities the US Postal Service accepts for ZIP code 48191. Using any city not on this list may result in mail delivery delays.

City	Status
Willis	Preferred

Nearby ZIP codes

48160 Milan (5.8 mi) 48111 Belleville (6 mi) 48197 Ypsilanti (6 mi) 48164 New Boston (9.1 mi) 48117 Carleton (9.6 mi) 48198 Ypsilanti (10.3 mi) 48108 Ann Arbor (10.7 mi) 48104 Ann Arbor (12.7 mi) 48176 Saline (12.8 mi) 48174 Romulus (12.8 mi) 48131 Dundee (12.8 mi) 48242 Detroit (12.9 mi)

Demographics updated 06/2026

Population
Total population	4,059
Population density	252 / sq mi
State FIPS	26
County FIPS	161

Geography
Land area	16.12 sq mi
Water area	0.06 sq mi
Latitude	42.1232
Longitude	-83.5699
Timezone	Eastern (ET)
Area code	734

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.6%	34.6%	42.6%
$50k – $100k	37.8%	28.3%	31.1%
$100k – $200k	27.0%	25.3%	20.6%
Over $200k	10.5%	11.7%	5.7%

Demographics & statistics

4,059

Population

252

People per sq mi

48.6

Median age

$102,784

Median household income

$51,818

Per capita income

$253,000

Median home value

$1,391

Median monthly rent

91.8%

Home ownership

4.2%

Poverty rate

3.4%

Unemployment

1,498

Housing units

22.8%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

146

10–14

151

144

15–19

148

165

20–24

170

25–34

222

35–44

228

409

45–54

421

133

55–59

137

227

60–64

233

241

65–74

247

118

75–84

122

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	722	17.8%
18 and over	3,337	82.2%
65 and over	750	18.5%
Median age	48.6 years

Race & ethnicity

White 74.9%

Two or more races 11.8%

Hispanic or Latino 7.8%

Black or African American 3.2%

Asian 1.2%

Other race 0.8%

American Indian / Alaska Native 0.2%

Group	Count	%
White	3,297	74.9%
Two or more races	521	11.8%
Hispanic or Latino	343	7.8%
Black or African American	140	3.2%
Asian	55	1.2%
Other race	36	0.8%
American Indian / Alaska Native	10	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	24.6%	34.6%	42.6%
$50k – $100k	37.8%	28.3%	31.1%
$100k – $200k	27.0%	25.3%	20.6%
Over $200k	10.5%	11.7%	5.7%

Under $10k 1.0%

$10k–$15k 2.6%

$15k–$25k 2.2%

$25k–$35k 3.2%

$35k–$50k 10.3%

$50k–$75k 17.7%

$75k–$100k 12.7%

$100k–$150k 21.2%

$150k–$200k 13.0%

$200k+ 16.2%

Range	% of households
Under $10k	1.0%
$10k–$15k	2.6%
$15k–$25k	2.2%
$25k–$35k	3.2%
$35k–$50k	10.3%
$50k–$75k	17.7%
$75k–$100k	12.7%
$100k–$150k	21.2%
$150k–$200k	13.0%
$200k+	16.2%
Median income	$102,784

Housing

Home values

Under $50k 8.6%

$50k–$100k 7.6%

$100k–$150k 5.9%

$150k–$200k 14.3%

$200k–$300k 26.7%

$300k–$500k 27.9%

$500k–$1M 7.9%

$1M+ 1.0%

Housing overview

Metric	Value
Median home value	$253,000
Median rent / month	$1,391
Owner occupied	91.8%
Renter occupied	8.2%
Vacant	5.2%
Single-family detached	77.1%
Large apartment buildings	0.0%
Mobile homes	22.9%
Median rooms	6.7
Avg household size (owned)	2.61

Year built

Era	%
2020 or later	0.6%
2010–2019	5.1%
2000–2009	29.5%
1990–1999	19.5%
1980–1989	2.5%
1970–1979	12.5%
1960–1969	4.1%
1950–1959	13.6%
1940–1949	1.0%
1939 or earlier	11.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	5.1%
3 bedrooms	66.1%
4 bedrooms	24.4%
5+ bedrooms	4.4%

Vehicles per household

Vehicles	% of households
No vehicle	1.9%
1 vehicle	18.2%
2 vehicles	47.2%
3 or more	32.6%

Heating fuel

Fuel type	%
Utility gas	83.7%
Electricity	6.5%
Propane / LP gas	9.6%
Fuel oil	0.2%

Households & families

Household type	Count	%
Married-couple family	998	64.8%
Cohabiting couple	37	2.4%
Male householder, no spouse	214	13.9%
Female householder, no spouse	292	18.9%
Households with children under 18	437	28.4%
Households with seniors (65+)	574	37.2%
Average household size	2.63

Marital status

Status	Male	Female
Never married	26.2%	26.0%
Married	62.8%	55.4%
Separated	0.0%	0.3%
Widowed	0.4%	6.0%
Divorced	10.7%	12.2%

Education

Less than 9th grade 2.0%

Some HS, no diploma 7.1%

HS graduate 34.4%

Some college, no degree 25.4%

Associate's degree 8.3%

Bachelor's degree 14.0%

Graduate / professional 8.8%

Metric	%
HS diploma or higher	90.9%
Bachelor's or higher	22.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	29	3.5%
Elementary school	265	31.5%
High school	274	32.6%
College / grad school	272	32.4%

Employment

Industry of employment

Education & healthcare 22.4%

Manufacturing 22.2%

Retail trade 9.3%

Transportation & utilities 8.2%

Arts, food & hospitality 8.1%

Other services 7.0%

Construction 6.7%

Professional & management 5.3%

Information 4.0%

Finance & real estate 3.2%

Wholesale trade 1.6%

Public administration 1.0%

Agriculture & mining 0.9%

Occupation

Category	%
Management, business & arts	30.2%
Service	17.7%
Sales & office	24.3%
Natural resources & construction	15.6%
Production & transportation	12.2%

Employment type

Type	%
Private sector	81.0%
Government	15.0%
Self-employed	4.0%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	81.9%
Carpool	7.4%
Public transit	0.0%
Walk	0.0%
Work from home	9.5%
Other means	1.2%
Avg commute (minutes)	27.8

Poverty

All people 4.2%

Under 18 years 4.5%

18 and over 4.2%

Married-couple families 1.4%

Female-led households 14.5%

Income support

Source	% of households
Social Security	38.9%
Retirement income	38.8%
Supplemental Security	4.1%
Cash public assistance	0.0%
Food stamps / SNAP	6.0%

Health indicators

Condition	%
Obesity	32.4%
High blood pressure	27.3%
High cholesterol	31.5%
Diabetes	9.0%
Heart disease	5.4%
Stroke	2.5%
Asthma	11.7%
Arthritis	25.9%
Kidney disease	2.5%
Pulmonary disease	5.9%
Cancer	6.4%

Behavior / access	%
Smoking	16.7%
Binge drinking	19.3%
No physical activity	16.9%
Less than 7 hrs sleep	34.3%
Depression	23.5%
Fair or poor health	11.4%
Poor mental health	15.8%
Poor physical health	9.2%
No health insurance	8.2%
Visited doctor (checkup)	70.7%
Visited dentist	72.9%
Cholesterol screening	92.2%
Teeth loss	9.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	249	7.5%

Disability	%
Any disability	11.8%
Under 18	7.2%
18–64 years	11.5%
65 and over	17.5%

Health insurance coverage

Type	%
Private insurance	85.5%
Public insurance	30.3%
No insurance	3.6%
Uninsured under 19	3.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,952	97.4%
Spanish	19	0.5%
Other Indo-European	0	0.0%
Asian & Pacific Islander	19	0.5%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,903	96.2%
Born in same state	3,864	95.2%
Born in different state	3,089	76.1%
Foreign born	39	1.0%
Naturalized citizen	156	3.8%
Not a US citizen	112	71.8%

Ancestry

Ancestry	Count	%
Arab	623	15.3%
Italian	487	12%
French	417	10.3%
Polish	127	3.1%
English	125	3.1%

Ancestry	Count	%
Irish	98	2.4%
German	49	1.2%
Norwegian	16	0.4%
Dutch	16	0.4%

Technology access

Metric	% of households
Computer access	38.0%
Internet access	94.0%

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

Frequently asked questions about ZIP code 48191

What city is ZIP code 48191 in?

ZIP code 48191 is primarily assigned to Willis, Michigan.

What county is ZIP code 48191 in?

ZIP code 48191 falls within Washtenaw County, Michigan.

Is ZIP code 48191 mostly owner-occupied?

92% of occupied units in ZIP code 48191 are owner-occupied, well above the national average.

Does ZIP code 48191 have a large retiree population?

39% of households in ZIP code 48191 receive Social Security income, suggesting a significant retiree or disability population.

What is the median household income in ZIP code 48191?

The median household income in ZIP code 48191 is $102,784, above the national median of ~$75,000.

What is the population of ZIP code 48191?

ZIP code 48191 has an estimated population of 4,059 residents, with a density of 252 people per square mile.

What timezone is ZIP code 48191 in?

ZIP code 48191 observes the EST timezone.