Lake Mills ZIP Code List — Winnebago County, IA

There is one unique ZIP code in Lake Mills, Iowa and it is 50450. Area code: 641.

ZIP codes

84.54

sq mi land

1.66

sq mi water

641

area code

Lake Mills, IA ZIP code map

About Lake Mills, IA

Lake Mills is a charming city located in the north-central part of Iowa, known for its friendly community and vibrant local culture. Nestled in Winnebago County, it embodies the classic Midwestern values of hard work and hospitality. The city's picturesque landscapes and ample recreational opportunities make it an inviting place for both residents and visitors alike.

Location & geography

Lake Mills is strategically situated in Winnebago County, with easy access to neighboring communities. It is approximately 14 miles northwest of Forest City and around 24 miles from the city of Clear Lake, making it accessible without losing its small-town appeal. The total area of Lake Mills measures 84.54 square miles of land, complemented by 1.66 square miles of water, contributing to its scenic beauty and outdoor activities.

Community & economy

The community in Lake Mills is characterized by its close-knit atmosphere, where residents often come together for local events and celebrations. Agriculture, manufacturing, and small businesses play significant roles in the local economy, providing a variety of employment opportunities. Daily life in Lake Mills is vibrant, with residents enjoying local parks, shops, and community gatherings that foster a sense of belonging.

Transportation

Lake Mills is conveniently connected by several major highways, including U.S. Route 69, which facilitates easy travel to surrounding areas. The nearest named airport is the Mason City Municipal Airport, located approximately 30 miles to the south, serving as the primary air travel hub for residents. Public transit options may be limited but local services help connect the community to essential amenities.

History

Founded in the mid-19th century, Lake Mills has grown from a small settlement into a thriving community. Key industries have historically included agriculture and manufacturing, which continue to shape the local economy today. Notable events, such as the annual Lake Mills Arts and Crafts Festival, showcase the city’s dedication to celebrating its rich heritage and local talent.

Did you know?

One surprising fact about Lake Mills is that it is home to the iconic Lake Mills Municipal Band, which has been a cherished part of the community for generations. Additionally, the city boasts a stunning array of outdoor activities, thanks to the surrounding lakes and parks, which attract tourists from nearby regions.

ZIP codes for Lake Mills, IA (1)

ZIP code	City	County	Map
50450	Lake Mills	Winnebago	View map

Demographics & statistics

2,839

Population

45.8

Median age

$73,142

Median household income

$35,010

Per capita income

$139,800

Median home value

$658

Median monthly rent

71.3%

Home ownership

8.8%

Poverty rate

2.0%

Unemployment

1,047

Housing units

17.6%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

100

20–24

172

25–34

180

127

35–44

132

169

45–54

177

105

55–59

110

60–64

146

65–74

152

139

75–84

146

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	571	20.1%
18 and over	2,268	79.9%
65 and over	726	25.6%
Median age	45.8 years

Race & ethnicity

White 91.7%

Two or more races 4.2%

Hispanic or Latino 3.7%

Other race 0.3%

Asian 0.1%

Group	Count	%
White	2,703	91.7%
Two or more races	124	4.2%
Hispanic or Latino	109	3.7%
Other race	9	0.3%
Asian	3	0.1%

Household income

Under $10k 3.7%

$10k–$15k 4.1%

$15k–$25k 7.0%

$25k–$35k 7.6%

$35k–$50k 12.0%

$50k–$75k 20.1%

$75k–$100k 17.5%

$100k–$150k 21.1%

$150k–$200k 3.8%

$200k+ 3.1%

Range	% of households
Under $10k	3.7%
$10k–$15k	4.1%
$15k–$25k	7.0%
$25k–$35k	7.6%
$35k–$50k	12.0%
$50k–$75k	20.1%
$75k–$100k	17.5%
$100k–$150k	21.1%
$150k–$200k	3.8%
$200k+	3.1%
Median income	$73,142

Housing

Home values

Under $50k 3.3%

$50k–$100k 28.6%

$100k–$150k 23.4%

$150k–$200k 15.7%

$200k–$300k 17.7%

$300k–$500k 10.9%

$500k–$1M 0.5%

Housing overview

Metric	Value
Median home value	$139,800
Median rent / month	$658
Owner occupied	71.3%
Renter occupied	28.7%
Vacant	12.3%
Single-family detached	85.5%
Large apartment buildings	2.4%
Mobile homes	0.9%
Median rooms	6.0
Avg household size (owned)	2.33

Year built

Era	%
2020 or later	0.0%
2010–2019	0.7%
2000–2009	7.1%
1990–1999	8.9%
1980–1989	4.6%
1970–1979	17.6%
1960–1969	10.4%
1950–1959	10.4%
1940–1949	3.9%
1939 or earlier	36.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.4%
1 bedroom	7.4%
2 bedrooms	35.8%
3 bedrooms	32.9%
4 bedrooms	20.9%
5+ bedrooms	2.6%

Vehicles per household

Vehicles	% of households
No vehicle	6.8%
1 vehicle	27.0%
2 vehicles	45.6%
3 or more	20.6%

Heating fuel

Fuel type	%
Utility gas	54.6%
Electricity	20.8%
Propane / LP gas	22.6%
Wood	0.6%
Solar	0.5%

Households & families

Household type	Count	%
Married-couple family	610	49.7%
Cohabiting couple	95	7.7%
Male householder, no spouse	225	18.3%
Female householder, no spouse	298	24.3%
Households with children under 18	278	22.6%
Households with seniors (65+)	465	37.9%
Average household size	2.27

Marital status

Status	Male	Female
Never married	33.5%	22.9%
Married	52.3%	50.2%
Separated	0.9%	0.6%
Widowed	4.7%	14.7%
Divorced	8.7%	11.5%

Education

Less than 9th grade 1.4%

Some HS, no diploma 4.2%

HS graduate 37.0%

Some college, no degree 24.2%

Associate's degree 15.6%

Bachelor's degree 12.7%

Graduate / professional 4.9%

Metric	%
HS diploma or higher	94.4%
Bachelor's or higher	17.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	51	9.8%
Kindergarten	29	5.6%
Elementary school	218	42.0%
High school	157	30.3%
College / grad school	64	12.3%

Employment

Industry of employment

Education & healthcare 27.7%

Manufacturing 22.2%

Retail trade 11.2%

Arts, food & hospitality 9.9%

Transportation & utilities 7.6%

Wholesale trade 6.3%

Construction 3.5%

Finance & real estate 2.9%

Information 2.2%

Professional & management 2.0%

Other services 2.0%

Agriculture & mining 1.6%

Public administration 0.7%

Occupation

Category	%
Management, business & arts	26.4%
Service	15.7%
Sales & office	19.5%
Natural resources & construction	10.9%
Production & transportation	27.5%

Employment type

Type	%
Private sector	85.3%
Government	10.1%
Self-employed	4.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	78.6%
Carpool	10.4%
Public transit	0.0%
Walk	2.7%
Other means	1.0%
Avg commute (minutes)	16.6

Poverty

All people 8.8%

Under 18 years 14.4%

18 and over 7.4%

Married-couple families 0.0%

Female-led households 45.6%

Income support

Source	% of households
Social Security	41.3%
Retirement income	33.2%
Supplemental Security	4.2%
Cash public assistance	1.8%
Food stamps / SNAP	12.5%

Health indicators

Condition	%
High blood pressure	36.8%
High cholesterol	34.4%
Heart disease	7.8%
Stroke	3.4%
Asthma	8.9%
Arthritis	27.6%
Kidney disease	3.2%
Pulmonary disease	7.2%
Cancer	8.6%

Behavior / access	%
Binge drinking	19.8%
No physical activity	24.4%
Less than 7 hrs sleep	30.4%
Fair or poor health	12.9%
Poor mental health	12.3%
Poor physical health	9.8%
No health insurance	8.9%
Visited doctor (checkup)	76.0%
Visited dentist	69.3%
Cholesterol screening	90.2%
Teeth loss	12.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	165	7.3%

Disability	%
Any disability	11.0%
Under 18	4.4%
18–64 years	6.3%
65 and over	27.1%

Health insurance coverage

Type	%
Private insurance	74.6%
Public insurance	41.9%
Uninsured under 19	5.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,727	96.1%
Spanish	97	3.6%
Other Indo-European	94	3.4%
Asian & Pacific Islander	3	0.1%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,823	99.4%
Born in same state	2,724	95.9%
Born in different state	1,413	49.8%
Foreign born	99	3.5%
Naturalized citizen	16	0.6%
Not a US citizen	11	68.8%

Ancestry

Ancestry	Count	%
Polish	1,305	46%
French	200	7%
Arab	156	5.5%

Ancestry	Count	%
Italian	119	4.2%
English	73	2.6%
Dutch	29	1%

Technology access

Metric	% of households
Computer access	43.3%
Internet access	87.7%

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

Frequently asked questions

What is the ZIP code for Lake Mills, IA?

Lake Mills, IA has one ZIP code: 50450.

What is the main ZIP code for Lake Mills, IA?

The primary ZIP code for Lake Mills, IA is 50450. The city uses area code 641 for phone service.

What county is Lake Mills, IA in?

Lake Mills is located in Winnebago County, Iowa.

How many ZIP codes are in Lake Mills, IA?

Lake Mills, IA has 1 ZIP code.

What ZIP code should I use to mail a letter to the Lake Mills Public Library located downtown?

The Lake Mills Public Library in downtown Lake Mills uses the ZIP code 50450.

What is the ZIP code for businesses located near the Lake Mills & Okoboji Railroad, a historic landmark in the city?

The Lake Mills & Okoboji Railroad and surrounding downtown business district are located in ZIP code 50450.