50577 ZIP Code — Renwick, IA

Humboldt County, Iowa

ZIP code 50577 is located in Renwick, Iowa, within Humboldt County. It covers approximately 38.94 square miles and serves a population of 383 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 515.

About ZIP code 50577

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 $81,200. Owner-occupancy is high at 88%, well above the national average.

Median household income is $60,469. 33% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is sales and office, with manufacturing as the leading industry. The average commute of 25 minutes is near the national average.

College attainment at 10% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 50577 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

383

population

38.94

sq mi land

Standard

ZIP type

Central (CT)

timezone

50577 ZIP code map

Cities in ZIP code 50577

Below are the cities the US Postal Service accepts for ZIP code 50577. Using any city not on this list may result in mail delivery delays.

City	Status
Renwick	Preferred

Nearby ZIP codes

50542 Goldfield (4.7 mi) 50558 Livermore (8.6 mi) 50560 Lu Verne (9.6 mi) 50430 Corwith (10.4 mi) 50447 Kanawha (11.2 mi) 50591 Thor (11.9 mi) 50529 Dakota City (13.6 mi) 50548 Humboldt (14.3 mi) 50519 Bode (14.5 mi) 50533 Eagle Grove (14.7 mi) 50525 Clarion (14.7 mi) 50526 Clarion (15.4 mi)

Demographics updated 05/2026

Population
Total population	383
Population density	10 / sq mi
State FIPS	19
County FIPS	091

Geography
Land area	38.94 sq mi
Water area	0.00 sq mi
Latitude	42.8489
Longitude	-93.9911
Timezone	Central (CT)
Area code	515

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	60.2%	42.4%	40.1%
$50k – $100k	28.7%	34.6%	33.4%
$100k – $200k	11.0%	19.5%	21.5%
Over $200k	0.0%	3.5%	5.0%

Demographics & statistics

383

Population

People per sq mi

51.4

Median age

$60,469

Median household income

$39,553

Per capita income

$81,200

Median home value

$689

Median monthly rent

88.2%

Home ownership

9.7%

Poverty rate

0.4%

Unemployment

220

Housing units

9.6%

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

← Male

Female →

Age summary

Group	Count	%
Under 18	50	13.1%
18 and over	333	86.9%
65 and over	62	16.2%
Median age	51.4 years

Race & ethnicity

White 78.3%

Two or more races 9%

Hispanic or Latino 8.8%

American Indian / Alaska Native 2.4%

Black or African American 1%

Other race 0.5%

Group	Count	%
White	329	78.3%
Two or more races	38	9%
Hispanic or Latino	37	8.8%
American Indian / Alaska Native	10	2.4%
Black or African American	4	1%
Other race	2	0.5%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	60.2%	42.4%	40.1%
$50k – $100k	28.7%	34.6%	33.4%
$100k – $200k	11.0%	19.5%	21.5%
Over $200k	0.0%	3.5%	5.0%

Under $10k 5.9%

$10k–$15k 4.9%

$15k–$25k 3.9%

$25k–$35k 5.9%

$35k–$50k 23.6%

$50k–$75k 23.6%

$75k–$100k 3.0%

$100k–$150k 24.1%

$150k–$200k 2.5%

$200k+ 2.5%

Range	% of households
Under $10k	5.9%
$10k–$15k	4.9%
$15k–$25k	3.9%
$25k–$35k	5.9%
$35k–$50k	23.6%
$50k–$75k	23.6%
$75k–$100k	3.0%
$100k–$150k	24.1%
$150k–$200k	2.5%
$200k+	2.5%
Median income	$60,469

Housing

Home values

Under $50k 34.6%

$50k–$100k 23.5%

$100k–$150k 8.4%

$150k–$200k 7.8%

$200k–$300k 25.1%

$500k–$1M 0.6%

Housing overview

Metric	Value
Median home value	$81,200
Median rent / month	$689
Owner occupied	88.2%
Renter occupied	11.8%
Vacant	16.8%
Single-family detached	95.5%
Large apartment buildings	0.0%
Mobile homes	4.1%
Median rooms	6.8
Avg household size (owned)	1.85

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	0.0%
1980–1989	8.6%
1970–1979	9.8%
1960–1969	7.4%
1950–1959	13.1%
1940–1949	12.3%
1939 or earlier	48.8%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.8%
2 bedrooms	18.0%
3 bedrooms	56.6%
4 bedrooms	14.8%
5+ bedrooms	9.8%

Vehicles per household

Vehicles	% of households
No vehicle	1.0%
1 vehicle	9.9%
2 vehicles	48.8%
3 or more	40.4%

Heating fuel

Fuel type	%
Utility gas	5.9%
Electricity	13.8%
Propane / LP gas	78.3%
Fuel oil	1.0%
Wood	0.5%

Households & families

Household type	Count	%
Married-couple family	105	51.7%
Cohabiting couple	27	13.3%
Male householder, no spouse	51	25.1%
Female householder, no spouse	20	9.9%
Households with children under 18	29	14.3%
Households with seniors (65+)	53	26.1%
Average household size	1.89

Marital status

Status	Male	Female
Never married	28.0%	19.6%
Married	52.4%	64.1%
Separated	0.0%	0.0%
Widowed	1.1%	5.9%
Divorced	18.5%	10.5%

Education

Less than 9th grade 1.0%

Some HS, no diploma 5.5%

HS graduate 26.7%

Some college, no degree 46.9%

Associate's degree 10.3%

Bachelor's degree 5.8%

Graduate / professional 3.8%

Metric	%
HS diploma or higher	93.5%
Bachelor's or higher	9.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	1	2.5%
Kindergarten	0	0.0%
Elementary school	24	60.0%
High school	13	32.5%
College / grad school	2	5.0%

Employment

Industry of employment

Manufacturing 13.4%

Public administration 12.6%

Agriculture & mining 12.2%

Professional & management 11.3%

Other services 9.7%

Construction 7.6%

Wholesale trade 6.7%

Transportation & utilities 6.7%

Education & healthcare 4.6%

Arts, food & hospitality 4.6%

Retail trade 4.2%

Information 3.8%

Finance & real estate 2.5%

Occupation

Category	%
Management, business & arts	16.8%
Service	14.7%
Sales & office	26.1%
Natural resources & construction	23.1%
Production & transportation	19.3%

Employment type

Type	%
Private sector	72.3%
Government	16.8%
Self-employed	10.1%
Unpaid family workers	0.8%

Commute

Method	%
Drive alone	76.9%
Carpool	8.4%
Public transit	0.0%
Walk	4.6%
Work from home	8.4%
Other means	1.7%
Avg commute (minutes)	24.5

Poverty

All people 9.7%

Under 18 years 0.0%

18 and over 11.1%

Married-couple families 1.9%

Female-led households 21.4%

Income support

Source	% of households
Social Security	32.5%
Retirement income	16.7%
Supplemental Security	3.4%
Cash public assistance	3.0%
Food stamps / SNAP	8.9%

Health indicators

Condition	%
Obesity	37.4%
High blood pressure	37.3%
High cholesterol	36.7%
Diabetes	12.0%
Heart disease	8.5%
Stroke	3.7%
Asthma	9.3%
Arthritis	28.4%
Kidney disease	3.5%
Pulmonary disease	8.1%
Cancer	8.2%

Behavior / access	%
Smoking	17.7%
Binge drinking	20.2%
No physical activity	26.3%
Less than 7 hrs sleep	30.4%
Depression	17.3%
Fair or poor health	14.4%
Poor mental health	13.1%
Poor physical health	10.8%
No health insurance	9.4%
Visited doctor (checkup)	76.4%
Visited dentist	64.0%
Cholesterol screening	89.2%
Teeth loss	13.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	30	9.0%

Disability	%
Any disability	13.1%
Under 18	14.0%
18–64 years	9.2%
65 and over	29.0%

Health insurance coverage

Type	%
Private insurance	73.9%
Public insurance	36.0%
No insurance	2.3%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	366	95.6%
Spanish	22	6.0%
Other Indo-European	22	6.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	353	92.2%
Born in same state	352	91.9%
Born in different state	330	86.2%
Foreign born	1	0.3%
Naturalized citizen	30	7.8%
Not a US citizen	12	40.0%

Ancestry

Ancestry	Count	%
Italian	47	12.3%
Polish	42	11%
French	21	5.5%

Ancestry	Count	%
Dutch	20	5.2%
English	9	2.3%
Arab	7	1.8%

Technology access

Metric	% of households
Computer access	53.0%
Internet access	97.0%

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

Frequently asked questions about ZIP code 50577

What city is ZIP code 50577 in?

ZIP code 50577 is primarily assigned to Renwick, Iowa.

What county is ZIP code 50577 in?

ZIP code 50577 falls within Humboldt County, Iowa.

How educated is the population of ZIP code 50577?

10% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Is ZIP code 50577 mostly owner-occupied?

88% of occupied units in ZIP code 50577 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 50577?

The median home value in ZIP code 50577 is $81,200.

What is the population of ZIP code 50577?

ZIP code 50577 has an estimated population of 383 residents, with a density of 10 people per square mile.

What timezone is ZIP code 50577 in?

ZIP code 50577 observes the CST timezone.