Plainfield ZIP Codes — Bremer County, IA

There is one unique ZIP code in Plainfield, Iowa and it is 50666. Area code: 319.

ZIP codes

49.37

sq mi land

0.30

sq mi water

319

area code

Plainfield, IA ZIP code map

About Plainfield, IA

Plainfield is a small city located in Bremer County, Iowa. Known for its friendly community and rural charm, this quaint town offers a peaceful lifestyle away from the hustle and bustle of larger cities. Residents and visitors alike enjoy the natural beauty and small-town atmosphere found throughout Plainfield.

Location & geography

Plainfield is situated in the northeastern region of Iowa, approximately 12 miles northeast of Waverly and about 20 miles south of the picturesque Cedar Falls. The city encompasses a land area of 49.37 square miles, with a small water area of 0.30 square miles. This diverse terrain includes a blend of open fields and rural landscapes, making it ideal for outdoor activities.

Community & economy

The character of Plainfield reflects a close-knit community where locals take pride in their town and its heritage. Agriculture plays a significant role in the local economy, along with small businesses that contribute to daily life in the area. Residents enjoy a laid-back lifestyle, with community events and gatherings fostering a strong sense of belonging.

Transportation

Plainfield is accessible via local roads, with nearby highways providing connections to larger urban areas. The closest major highway is U.S. Route 218, which runs to the east and connects the town to regional hubs. For air travel, the nearest airport is the Waterloo Regional Airport, located approximately 25 miles to the northwest.

History

Plainfield was established in the late 19th century, contributing to the development of Bremer County's agricultural landscape. The city's growth was largely driven by farming and local businesses that provided goods and services to the community. Notable events in its history include the establishment of various community organizations that have helped maintain its small-town charm.

Did you know?

A surprising fact about Plainfield is that it is home to several scenic parks and recreational areas, which are often frequented by both locals and tourists. Additionally, the town's commitment to preserving its historical landmarks contributes to its unique character.

ZIP codes for Plainfield, IA (1)

ZIP code	City	County	Map
50666	Plainfield	Bremer	View map

Demographics & statistics

720

Population

54.3

Median age

$72,857

Median household income

$34,882

Per capita income

$163,600

Median home value

$646

Median monthly rent

87.9%

Home ownership

4.9%

Poverty rate

6.0%

Unemployment

316

Housing units

11.2%

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

103

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	129	17.9%
18 and over	591	82.1%
65 and over	271	37.6%
Median age	54.3 years

Race & ethnicity

White 97.5%

Two or more races 1.7%

Native Hawaiian / Pacific Islander 0.7%

American Indian / Alaska Native 0.1%

Group	Count	%
White	702	97.5%
Two or more races	12	1.7%
Native Hawaiian / Pacific Islander	5	0.7%
American Indian / Alaska Native	1	0.1%

Household income

Under $10k 1.8%

$10k–$15k 0.3%

$15k–$25k 6.7%

$25k–$35k 3.0%

$35k–$50k 13.3%

$50k–$75k 37.6%

$75k–$100k 17.0%

$100k–$150k 16.7%

$150k–$200k 2.4%

$200k+ 1.2%

Range	% of households
Under $10k	1.8%
$10k–$15k	0.3%
$15k–$25k	6.7%
$25k–$35k	3.0%
$35k–$50k	13.3%
$50k–$75k	37.6%
$75k–$100k	17.0%
$100k–$150k	16.7%
$150k–$200k	2.4%
$200k+	1.2%
Median income	$72,857

Housing

Home values

Under $50k 2.8%

$50k–$100k 21.7%

$100k–$150k 19.3%

$150k–$200k 18.6%

$200k–$300k 32.8%

$300k–$500k 4.8%

Housing overview

Metric	Value
Median home value	$163,600
Median rent / month	$646
Owner occupied	87.9%
Renter occupied	12.1%
Vacant	7.3%
Single-family detached	97.5%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.6
Avg household size (owned)	2.18

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	6.2%
1990–1999	5.6%
1980–1989	2.2%
1970–1979	28.9%
1960–1969	16.6%
1950–1959	9.3%
1940–1949	3.9%
1939 or earlier	27.2%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	5.1%
2 bedrooms	37.4%
3 bedrooms	45.2%
4 bedrooms	7.6%
5+ bedrooms	4.8%

Vehicles per household

Vehicles	% of households
No vehicle	0.3%
1 vehicle	21.2%
2 vehicles	33.3%
3 or more	45.2%

Heating fuel

Fuel type	%
Utility gas	50.0%
Electricity	10.6%
Propane / LP gas	35.8%
Fuel oil	0.3%
Wood	3.0%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	197	59.7%
Cohabiting couple	15	4.5%
Male householder, no spouse	58	17.6%
Female householder, no spouse	60	18.2%
Households with children under 18	83	25.2%
Households with seniors (65+)	154	46.7%
Average household size	2.18

Marital status

Status	Male	Female
Never married	16.1%	20.4%
Married	67.2%	66.5%
Separated	0.0%	0.0%
Widowed	1.3%	8.5%
Divorced	15.4%	4.7%

Education

Less than 9th grade 0.2%

Some HS, no diploma 2.7%

HS graduate 52.8%

Some college, no degree 22.7%

Associate's degree 10.5%

Bachelor's degree 10.8%

Graduate / professional 0.4%

Metric	%
HS diploma or higher	97.2%
Bachelor's or higher	11.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	6	5.8%
Kindergarten	1	1.0%
Elementary school	46	44.2%
High school	46	44.2%
College / grad school	5	4.8%

Employment

Industry of employment

Manufacturing 35.8%

Education & healthcare 14.5%

Retail trade 13.6%

Construction 8.4%

Transportation & utilities 6.9%

Public administration 5.5%

Finance & real estate 4.9%

Professional & management 3.8%

Agriculture & mining 2.0%

Information 1.7%

Wholesale trade 1.2%

Other services 1.2%

Arts, food & hospitality 0.6%

Occupation

Category	%
Management, business & arts	22.5%
Service	11.0%
Sales & office	16.8%
Natural resources & construction	11.6%
Production & transportation	38.2%

Employment type

Type	%
Private sector	77.7%
Government	14.2%
Self-employed	7.8%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	89.3%
Carpool	5.5%
Public transit	0.3%
Walk	0.0%
Other means	0.3%
Avg commute (minutes)	25.8

Poverty

All people 4.9%

Under 18 years 17.1%

18 and over 2.2%

Married-couple families 0.0%

Female-led households 18.9%

Income support

Source	% of households
Social Security	51.2%
Retirement income	26.7%
Supplemental Security	0.6%
Cash public assistance	1.2%
Food stamps / SNAP	7.6%

Health indicators

Condition	%
High blood pressure	32.7%
High cholesterol	33.0%
Heart disease	6.5%
Stroke	2.9%
Asthma	9.2%
Arthritis	24.9%
Kidney disease	2.7%
Pulmonary disease	6.7%
Cancer	6.8%

Behavior / access	%
Binge drinking	22.8%
No physical activity	24.1%
Less than 7 hrs sleep	30.0%
Fair or poor health	12.2%
Poor mental health	13.4%
Poor physical health	9.5%
No health insurance	9.0%
Visited doctor (checkup)	75.2%
Visited dentist	69.0%
Cholesterol screening	88.4%
Teeth loss	12.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	61	10.3%

Disability	%
Any disability	9.6%
Under 18	0.8%
18–64 years	10.0%
65 and over	13.3%

Health insurance coverage

Type	%
Private insurance	80.8%
Public insurance	58.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	687	95.4%
Spanish	1	0.1%
Other Indo-European	0	0.0%
Asian & Pacific Islander	1	0.1%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	719	99.9%
Born in same state	714	99.2%
Born in different state	655	91.0%
Foreign born	5	0.7%
Naturalized citizen	1	0.1%
Not a US citizen	1	100.0%

Ancestry

Ancestry	Count	%
Italian	44	6.1%
Arab	39	5.4%
French	36	5%

Ancestry	Count	%
Polish	25	3.5%
English	17	2.4%
Dutch	7	1%

Technology access

Metric	% of households
Computer access	45.8%
Internet access	94.2%

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

Frequently asked questions

What ZIP codes does Plainfield, IA have?

Plainfield, IA has one ZIP code: 50666. Each ZIP code serves a distinct delivery area within the city and surrounding region.