PlainZIP

Plainfield, IA · standard

ZIP Code 50666

Bremer County, Iowa - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,027
7/sq mi
$79,867
Median income
$203,700
Median home value
7.8%
Bachelor's or higher

The verdict

Plainfield pairs an above-median household income with below-median home values, in a rural, homeowner-dominated area.

Top 38%
household income, US ZIPs
44th pct
home value, US ZIPs
7
people per sq mi
95%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 50666 against every reporting US ZIP.

ZIP code 50666 is a sparsely populated ZIP (a standard USPS delivery area) in Plainfield, Bremer County, Iowa, home to just 1,027 residents across 138.8 square miles, a density of 7 people per square mile, in the Chicago time zone.

ZIP 50666 lands in the middle-income range, with a median household income of $79,867 (4% above the Iowa average), while per-capita income is $38,596. Local economic indicators show a 4.2% poverty rate alongside 3.8% unemployment. Housing costs here run $203,700 for a typical home value (16% above the state average), with rent averaging $684 a month; 94.7% of homes are owner-occupied.

Formal educational attainment runs low here: just 7.8% of adults hold a bachelor's degree or higher, the median age is 49.6, and the average commute is -. Beyond these figures, 3 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Bremer County, letting you compare 50666 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 50666

Top 5 sectors by establishment count in Plainfield, IA

Which industries have the most business establishments in ZIP 50666.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 50666, Plainfield, IA · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

1,027

Population

138.8

Area (sq mi)

7

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 50666?

49.6

Median Age

53.7%

Male

46.3%

Female

0.4%

Foreign-Born

White 95.5%
African American 0.0%
Asian 0.3%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.4%
Two or More Ethnicities 3.7%
Hispanic or Latino 1.5%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$79,867

Median Household Income

+4% vs state

$38,596

Per Capita Income

4.2%

Poverty Rate

3.8%

Unemployment Rate

How ZIP 50666 ranks nationally

Plainfield, IA household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$79,867 Top 38% higher than 62% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). This entry sits in this band. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 61.0%
Bachelor's Degree or Higher 7.8%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

365

Total Housing Units

321

Occupied Units

44

Vacant Units

2.35

Avg Household Size

Occupancy Type

Owner 94.7%
Renter 5.3%

$203,700

Median Home Value

+16% vs state

$684

Median Rent

1949

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 18 business establishments in ZIP 50666, employing approximately 73 people with a combined annual payroll of $3,245,000.

18

Businesses

73

Employees

$3.2M

Annual Payroll

3

Industry Sectors

Industry Establishments % of Total
Other services (except public administration) 4 22.2%
Construction 3 16.7%
Finance and insurance 3 16.7%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 50666 vs 50658 →

ZIP 50666 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 50666 ranks #4 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 50666 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 50666 ranks #3 of 4 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
50658 Nashua, IA 2,518 6.6 mi
50677 Waverly, IA 12,131 8.0 mi
50619 Clarksville, IA 2,410 8.7 mi

More ZIP Codes in Bremer County

50677 standard
Waverly, IA
Pop: 12,131
50674 standard
Sumner, IA
Pop: 3,555
50622 standard
Denver, IA
Pop: 3,206
50676 standard
Tripoli, IA
Pop: 2,105
50647 standard
Janesville, IA
Pop: 1,894
50668 standard
Readlyn, IA
Pop: 1,249

Related Areas

Bremer County Plainfield, IA Iowa

Frequently Asked Questions

What county is ZIP code 50666 in? ▼
ZIP code 50666 (Plainfield) is located in Bremer County, Iowa. Bremer County contains multiple ZIP codes, see the full list at /counties/bremer-ia.
What is the population of ZIP code 50666? ▼
ZIP code 50666 in Plainfield, IA has a population of 1,027 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 50666? ▼
The median household income in ZIP 50666 is $79,867, which is 5% above the national average of $76,288.
What is the average home value in ZIP 50666? ▼
The median home value in ZIP 50666 is $203,700, which is 27% below the national average of $278,155.
What is the demographic makeup of ZIP 50666? ▼
The largest racial group in ZIP 50666 is White at 95.5%. Hispanic or Latino residents make up 1.5% of the population.
How many businesses are in ZIP code 50666? ▼
ZIP code 50666 has 18 business establishments employing approximately 73 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 50666? ▼
The top industries by establishment count in ZIP 50666 are: Other services (except public administration) (4), Construction (3), Finance and insurance (3). There are 3 industry sectors represented in total.
What is the education level in ZIP code 50666? ▼
In ZIP code 50666, 61.0% of residents aged 25+ have a high school diploma or higher, and 7.8% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 50666? ▼
In ZIP code 50666, approximately 94.7% of occupied housing units are owner-occupied and 5.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 50666? ▼
The poverty rate in ZIP code 50666 is 4.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.