51640 ZIP Code — Hamburg, IA

Fremont County, Iowa

ZIP code 51640 is located in Hamburg, Iowa, within Fremont County. It covers approximately 115.41 square miles and serves a population of 1,503 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 712.

About ZIP code 51640

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 $119,600. Owner-occupancy is high at 78%, well above the national average.

Median household income is $59,300. 35% 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 22 minutes is near the national average.

College attainment at 13% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 51640 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

1,503

population

115.41

sq mi land

Standard

ZIP type

Central (CT)

timezone

51640 ZIP code map

Cities in ZIP code 51640

Below are the cities the US Postal Service accepts for ZIP code 51640. Using any city not on this list may result in mail delivery delays.

City	Status
Hamburg	Preferred

Nearby ZIP codes

51650 Riverton (2.9 mi) 51639 Farragut (8.9 mi) 51652 Sidney (9.6 mi) 68421 Peru (13 mi) 64482 Rock Port (13.1 mi) 51603 Shenandoah (14.3 mi) 68410 Nebraska City (14.5 mi) 51649 Randolph (14.7 mi) 51654 Thurman (14.7 mi) 51601 Shenandoah (14.8 mi) 64498 Westboro (15.8 mi) 51653 Tabor (16.8 mi)

Demographics updated 05/2026

Population
Total population	1,503
Population density	13 / sq mi
State FIPS	19
County FIPS	071

Geography
Land area	115.41 sq mi
Water area	1.56 sq mi
Latitude	40.6351
Longitude	-95.5836
Timezone	Central (CT)
Area code	712

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	55.6%	42.6%	40.1%
$50k – $100k	27.5%	35.7%	33.4%
$100k – $200k	13.6%	18.6%	21.5%
Over $200k	3.3%	3.1%	5.0%

Demographics & statistics

1,503

Population

People per sq mi

43.2

Median age

$59,300

Median household income

$33,000

Per capita income

$119,600

Median home value

$686

Median monthly rent

78.1%

Home ownership

10.6%

Poverty rate

2.3%

Unemployment

615

Housing units

13.3%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

100

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	359	23.9%
18 and over	1,144	76.1%
65 and over	281	18.7%
Median age	43.2 years

Race & ethnicity

White 92.6%

Two or more races 3.5%

Hispanic or Latino 3%

Other race 0.8%

Group	Count	%
White	1,435	92.6%
Two or more races	55	3.5%
Hispanic or Latino	47	3%
Other race	13	0.8%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	55.6%	42.6%	40.1%
$50k – $100k	27.5%	35.7%	33.4%
$100k – $200k	13.6%	18.6%	21.5%
Over $200k	3.3%	3.1%	5.0%

Under $10k 3.1%

$10k–$15k 2.2%

$15k–$25k 11.3%

$25k–$35k 7.4%

$35k–$50k 15.2%

$50k–$75k 20.7%

$75k–$100k 11.8%

$100k–$150k 18.0%

$150k–$200k 6.7%

$200k+ 3.6%

Range	% of households
Under $10k	3.1%
$10k–$15k	2.2%
$15k–$25k	11.3%
$25k–$35k	7.4%
$35k–$50k	15.2%
$50k–$75k	20.7%
$75k–$100k	11.8%
$100k–$150k	18.0%
$150k–$200k	6.7%
$200k+	3.6%
Median income	$59,300

Housing

Home values

Under $50k 11.4%

$50k–$100k 23.1%

$100k–$150k 25.9%

$150k–$200k 13.7%

$200k–$300k 12.2%

$300k–$500k 12.0%

$500k–$1M 1.6%

Housing overview

Metric	Value
Median home value	$119,600
Median rent / month	$686
Owner occupied	78.1%
Renter occupied	21.9%
Vacant	15.5%
Single-family detached	91.8%
Large apartment buildings	0.0%
Mobile homes	1.3%
Median rooms	5.9
Avg household size (owned)	2.47

Year built

Era	%
2020 or later	0.0%
2010–2019	7.4%
2000–2009	5.3%
1990–1999	4.2%
1980–1989	7.4%
1970–1979	8.3%
1960–1969	10.2%
1950–1959	14.6%
1940–1949	5.2%
1939 or earlier	37.4%

Bedrooms

Size	% of units
No bedroom (studio)	0.3%
1 bedroom	6.6%
2 bedrooms	31.3%
3 bedrooms	37.2%
4 bedrooms	21.2%
5+ bedrooms	3.4%

Vehicles per household

Vehicles	% of households
No vehicle	1.3%
1 vehicle	30.1%
2 vehicles	39.7%
3 or more	29.0%

Heating fuel

Fuel type	%
Utility gas	70.2%
Electricity	11.0%
Propane / LP gas	16.5%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	329	51.6%
Cohabiting couple	53	8.3%
Male householder, no spouse	139	21.8%
Female householder, no spouse	117	18.3%
Households with children under 18	169	26.5%
Households with seniors (65+)	179	28.1%
Average household size	2.36

Marital status

Status	Male	Female
Never married	35.5%	22.1%
Married	52.9%	62.1%
Separated	0.0%	1.0%
Widowed	2.9%	7.7%
Divorced	8.7%	7.0%

Education

Less than 9th grade 1.6%

Some HS, no diploma 3.8%

HS graduate 42.3%

Some college, no degree 26.7%

Associate's degree 12.3%

Bachelor's degree 11.7%

Graduate / professional 1.6%

Metric	%
HS diploma or higher	94.6%
Bachelor's or higher	13.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	23	8.1%
Kindergarten	22	7.7%
Elementary school	115	40.5%
High school	81	28.5%
College / grad school	43	15.1%

Employment

Industry of employment

Education & healthcare 20.7%

Manufacturing 18.8%

Retail trade 10.7%

Public administration 10.7%

Agriculture & mining 8.6%

Transportation & utilities 7.8%

Professional & management 6.8%

Construction 5.9%

Arts, food & hospitality 3.6%

Other services 2.1%

Wholesale trade 1.8%

Finance & real estate 1.8%

Information 0.8%

Occupation

Category	%
Management, business & arts	37.0%
Service	13.3%
Sales & office	14.9%
Natural resources & construction	9.2%
Production & transportation	25.6%

Employment type

Type	%
Private sector	68.5%
Government	20.7%
Self-employed	10.4%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	86.2%
Carpool	9.2%
Public transit	0.0%
Walk	2.4%
Work from home	2.2%
Other means	0.0%
Avg commute (minutes)	22.3

Poverty

All people 10.6%

Under 18 years 17.4%

18 and over 8.5%

Married-couple families 0.6%

Female-led households 25.0%

Income support

Source	% of households
Social Security	34.5%
Retirement income	26.0%
Supplemental Security	4.9%
Cash public assistance	0.9%
Food stamps / SNAP	14.1%

Health indicators

Condition	%
Obesity	38.6%
High blood pressure	37.1%
High cholesterol	35.0%
Diabetes	11.9%
Heart disease	8.2%
Stroke	3.7%
Asthma	9.5%
Arthritis	29.1%
Kidney disease	3.4%
Pulmonary disease	8.2%
Cancer	8.1%

Behavior / access	%
Smoking	18.4%
Binge drinking	20.6%
No physical activity	26.6%
Less than 7 hrs sleep	31.4%
Depression	18.0%
Fair or poor health	15.0%
Poor mental health	13.5%
Poor physical health	11.0%
No health insurance	10.3%
Visited doctor (checkup)	76.9%
Visited dentist	64.1%
Cholesterol screening	88.4%
Teeth loss	14.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	90	7.9%

Disability	%
Any disability	12.4%
Under 18	1.1%
18–64 years	11.4%
65 and over	30.2%

Health insurance coverage

Type	%
Private insurance	76.7%
Public insurance	34.4%
No insurance	4.1%
Uninsured under 19	3.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,448	96.3%
Spanish	3	0.2%
Other Indo-European	3	0.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,493	99.3%
Born in same state	1,493	99.3%
Born in different state	598	39.8%
Foreign born	0	0.0%
Naturalized citizen	10	0.7%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
Italian	220	14.6%
Arab	135	9%
French	120	8%

Ancestry	Count	%
German	12	0.8%
Polish	11	0.7%
English	2	0.1%

Technology access

Metric	% of households
Computer access	42.4%
Internet access	94.4%

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

Frequently asked questions about ZIP code 51640

What city is ZIP code 51640 in?

ZIP code 51640 is primarily assigned to Hamburg, Iowa.

What county is ZIP code 51640 in?

ZIP code 51640 falls within Fremont County, Iowa.

How educated is the population of ZIP code 51640?

13% 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 typical home value in ZIP code 51640?

The median home value in ZIP code 51640 is $119,600.

What is the population of ZIP code 51640?

ZIP code 51640 has an estimated population of 1,503 residents, with a density of 13 people per square mile.

What is the median household income in ZIP code 51640?

The median household income in ZIP code 51640 is $59,300, below the national median of ~$75,000.

What timezone is ZIP code 51640 in?

ZIP code 51640 observes the CST timezone.