50631 ZIP Code — Frederika, IA

Bremer County, Iowa

ZIP code 50631 is located in Frederika, Iowa, within Bremer County. It covers approximately 0.19 square miles and serves a population of 250 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 319.

About ZIP code 50631

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $90,300. Owner-occupancy is high at 87%, well above the national average.

Median household income is $45,625.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. An above-average commute of 39 minutes suggests many residents work outside the immediate area.

College attainment at 14% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 50631 reflects a community defined by a trades-oriented workforce and high homeownership.

250

population

0.19

sq mi land

Standard

ZIP type

Central (CT)

timezone

50631 ZIP code map

Cities in ZIP code 50631

Below are the cities the US Postal Service accepts for ZIP code 50631. Using any city not on this list may result in mail delivery delays.

City	Status
Frederika	Acceptable

Demographics updated 05/2026

Population
Total population	250
Population density	1,316 / sq mi
State FIPS	19
County FIPS	017

Geography
Land area	0.19 sq mi
Water area	0.09 sq mi
Latitude	42.8812
Longitude	-92.3031
Timezone	Central (CT)
Area code	319

Total population by age

Gender

Race & ethnicity

Demographics & statistics

250

Population

1,316

People per sq mi

40.7

Median age

$45,625

Median household income

$25,157

Per capita income

$90,300

Median home value

$616

Median monthly rent

86.9%

Home ownership

16.0%

Poverty rate

4.2%

Unemployment

117

Housing units

13.9%

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

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	56	22.4%
18 and over	194	77.6%
65 and over	36	14.4%
Median age	40.7 years

Race & ethnicity

White 98.4%

Two or more races 1.6%

Group	Count	%
White	246	98.4%
Two or more races	4	1.6%

Household income

Under $10k 0.9%

$10k–$15k 2.8%

$15k–$25k 8.4%

$25k–$35k 16.8%

$35k–$50k 26.2%

$50k–$75k 14.0%

$75k–$100k 14.0%

$100k–$150k 15.0%

$200k+ 1.9%

Range	% of households
Under $10k	0.9%
$10k–$15k	2.8%
$15k–$25k	8.4%
$25k–$35k	16.8%
$35k–$50k	26.2%
$50k–$75k	14.0%
$75k–$100k	14.0%
$100k–$150k	15.0%
$200k+	1.9%
Median income	$45,625

Housing

Home values

Under $50k 10.8%

$50k–$100k 54.8%

$100k–$150k 11.8%

$150k–$200k 7.5%

$200k–$300k 10.8%

$300k–$500k 2.2%

$500k–$1M 2.2%

Housing overview

Metric	Value
Median home value	$90,300
Median rent / month	$616
Owner occupied	86.9%
Renter occupied	13.1%
Vacant	18.3%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.1
Avg household size (owned)	2.28

Year built

Era	%
2020 or later	0.0%
2010–2019	0.8%
2000–2009	3.8%
1990–1999	1.5%
1980–1989	3.1%
1970–1979	19.8%
1960–1969	6.9%
1950–1959	9.9%
1940–1949	17.6%
1939 or earlier	36.6%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	8.4%
2 bedrooms	49.6%
3 bedrooms	35.1%
4 bedrooms	5.3%
5+ bedrooms	1.5%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	24.3%
2 vehicles	49.5%
3 or more	26.2%

Heating fuel

Fuel type	%
Utility gas	1.9%
Electricity	4.7%
Propane / LP gas	88.8%
Fuel oil	0.9%
Wood	3.7%

Households & families

Household type	Count	%
Married-couple family	52	48.6%
Cohabiting couple	6	5.6%
Male householder, no spouse	30	28.0%
Female householder, no spouse	19	17.8%
Households with children under 18	35	32.7%
Households with seniors (65+)	26	24.3%
Average household size	2.34

Marital status

Status	Male	Female
Never married	32.7%	29.1%
Married	44.6%	46.6%
Separated	0.0%	1.0%
Widowed	0.0%	11.7%
Divorced	22.8%	11.7%

Education

Less than 9th grade 2.6%

Some HS, no diploma 3.3%

HS graduate 30.5%

Some college, no degree 32.5%

Associate's degree 17.2%

Bachelor's degree 12.6%

Graduate / professional 1.3%

Metric	%
HS diploma or higher	94.0%
Bachelor's or higher	13.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	9	23.1%
Kindergarten	0	0.0%
Elementary school	19	48.7%
High school	10	25.6%
College / grad school	1	2.6%

Employment

Industry of employment

Manufacturing 21.9%

Education & healthcare 21.2%

Construction 19.0%

Agriculture & mining 11.7%

Retail trade 10.2%

Professional & management 6.6%

Transportation & utilities 3.6%

Arts, food & hospitality 2.9%

Other services 2.9%

Occupation

Category	%
Management, business & arts	28.5%
Service	10.2%
Sales & office	8.0%
Natural resources & construction	28.5%
Production & transportation	24.8%

Employment type

Type	%
Private sector	86.9%
Government	8.8%
Self-employed	4.4%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	89.1%
Carpool	7.3%
Public transit	0.7%
Walk	0.0%
Work from home	2.9%
Other means	0.0%
Avg commute (minutes)	38.8

Poverty

All people 16.0%

Under 18 years 32.1%

18 and over 11.3%

Married-couple families 0.0%

Female-led households 50.0%

Income support

Source	% of households
Social Security	23.4%
Retirement income	20.6%
Supplemental Security	3.7%
Cash public assistance	3.7%
Food stamps / SNAP	5.6%

Health indicators

Condition	%
Obesity	0.0%
High blood pressure	0.0%
High cholesterol	0.0%
Diabetes	0.0%
Heart disease	0.0%
Stroke	0.0%
Asthma	0.0%
Arthritis	0.0%
Kidney disease	0.0%
Pulmonary disease	0.0%
Cancer	0.0%

Behavior / access	%
Smoking	0.0%
Binge drinking	0.0%
No physical activity	0.0%
Less than 7 hrs sleep	0.0%
Depression	0.0%
Fair or poor health	0.0%
Poor mental health	0.0%
Poor physical health	0.0%
No health insurance	0.0%
Visited doctor (checkup)	0.0%
Visited dentist	0.0%
Cholesterol screening	0.0%
Teeth loss	0.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	12	6.2%

Disability	%
Any disability	7.2%
Under 18	0.0%
18–64 years	3.2%
65 and over	36.1%

Health insurance coverage

Type	%
Private insurance	63.6%
Public insurance	38.4%
No insurance	7.2%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	240	96.0%
Spanish	1	0.4%
Other Indo-European	1	0.4%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	250	100.0%
Born in same state	250	100.0%
Born in different state	224	89.6%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	26	10.4%
Polish	20	8%
French	18	7.2%

Ancestry	Count	%
English	4	1.6%
Arab	1	0.4%

Technology access

Metric	% of households
Computer access	42.8%
Internet access	92.5%

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

Frequently asked questions about ZIP code 50631

What city is ZIP code 50631 in?

ZIP code 50631 is primarily assigned to Frederika, Iowa.

What county is ZIP code 50631 in?

ZIP code 50631 falls within Bremer County, Iowa.

Is ZIP code 50631 mostly owner-occupied?

87% of occupied units in ZIP code 50631 are owner-occupied, well above the national average.

How educated is the population of ZIP code 50631?

14% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

What is the poverty rate in ZIP code 50631?

16% of residents in ZIP code 50631 live below the poverty line, above the national average.

What is the typical home value in ZIP code 50631?

The median home value in ZIP code 50631 is $90,300.

What timezone is ZIP code 50631 in?

ZIP code 50631 observes the CST timezone.