57066 ZIP Code — Tyndall, SD

Bon Homme County, South Dakota

ZIP code 57066 is located in Tyndall, South Dakota, within Bon Homme County. It covers approximately 114.20 square miles and serves a population of 1,294 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57066

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 $103,800. Owner-occupancy is high at 78%, well above the national average.

Median household income is $48,264. 49% 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 18 minutes is near the national average.

Educational attainment is near the national average, with 27% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 16% of civilians, above the national average of 7%.

Overall, ZIP code 57066 reflects a community defined by a strong veteran community, high homeownership, and a significant Social Security-dependent population.

1,294

population

114.20

sq mi land

Standard

ZIP type

Central (CT)

timezone

57066 ZIP code map

Cities in ZIP code 57066

Below are the cities the US Postal Service accepts for ZIP code 57066. Using any city not on this list may result in mail delivery delays.

City	Status
Tyndall	Acceptable
Tyndall	Preferred

Nearby ZIP codes

57315 Avon (8.3 mi) 57059 Scotland (9.2 mi) 57063 Tabor (10 mi) 57062 Springfield (10.6 mi) 57040 Lesterville (15.9 mi) 57376 Tripp (16.9 mi) 68760 Niobrara (17.2 mi) 57067 Utica (19.4 mi)

Demographics updated 05/2026

Population
Total population	1,294
Population density	11 / sq mi
State FIPS	46
County FIPS	009

Geography
Land area	114.20 sq mi
Water area	0.03 sq mi
Latitude	42.9883
Longitude	-97.8723
Timezone	Central (CT)
Area code	605

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	54.5%	48.9%	41.7%
$50k – $100k	31.4%	32.3%	33.8%
$100k – $200k	11.7%	15.0%	20.1%
Over $200k	2.3%	3.9%	4.4%

Demographics & statistics

1,294

Population

People per sq mi

56.0

Median age

$48,264

Median household income

$29,240

Per capita income

$103,800

Median home value

$725

Median monthly rent

77.8%

Home ownership

9.3%

Poverty rate

2.3%

Unemployment

571

Housing units

26.5%

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

119

65–74

110

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	245	18.9%
18 and over	1,049	81.1%
65 and over	446	34.5%
Median age	56.0 years

Race & ethnicity

White 96.4%

American Indian / Alaska Native 1.7%

Two or more races 0.8%

Black or African American 0.6%

Hispanic or Latino 0.3%

Asian 0.2%

Group	Count	%
White	1,251	96.4%
American Indian / Alaska Native	22	1.7%
Two or more races	10	0.8%
Black or African American	8	0.6%
Hispanic or Latino	4	0.3%
Asian	3	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	54.5%	48.9%	41.7%
$50k – $100k	31.4%	32.3%	33.8%
$100k – $200k	11.7%	15.0%	20.1%
Over $200k	2.3%	3.9%	4.4%

Under $10k 6.7%

$10k–$15k 7.4%

$15k–$25k 3.1%

$25k–$35k 19.0%

$35k–$50k 16.1%

$50k–$75k 15.2%

$75k–$100k 17.8%

$100k–$150k 9.2%

$150k–$200k 4.1%

$200k+ 1.5%

Range	% of households
Under $10k	6.7%
$10k–$15k	7.4%
$15k–$25k	3.1%
$25k–$35k	19.0%
$35k–$50k	16.1%
$50k–$75k	15.2%
$75k–$100k	17.8%
$100k–$150k	9.2%
$150k–$200k	4.1%
$200k+	1.5%
Median income	$48,264

Housing

Home values

Under $50k 24.2%

$50k–$100k 22.0%

$100k–$150k 27.0%

$150k–$200k 3.7%

$200k–$300k 14.9%

$300k–$500k 3.1%

$500k–$1M 0.4%

$1M+ 4.6%

Housing overview

Metric	Value
Median home value	$103,800
Median rent / month	$725
Owner occupied	77.8%
Renter occupied	22.2%
Vacant	16.5%
Single-family detached	83.0%
Large apartment buildings	1.1%
Mobile homes	4.9%
Median rooms	6.1
Avg household size (owned)	2.13

Year built

Era	%
2020 or later	0.0%
2010–2019	3.3%
2000–2009	1.7%
1990–1999	6.3%
1980–1989	7.4%
1970–1979	13.8%
1960–1969	5.7%
1950–1959	13.4%
1940–1949	9.8%
1939 or earlier	38.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	11.0%
2 bedrooms	36.5%
3 bedrooms	31.2%
4 bedrooms	10.0%
5+ bedrooms	11.3%

Vehicles per household

Vehicles	% of households
No vehicle	4.8%
1 vehicle	18.3%
2 vehicles	27.7%
3 or more	49.2%

Heating fuel

Fuel type	%
Utility gas	4.6%
Electricity	46.5%
Propane / LP gas	39.3%
Fuel oil	6.8%

Households & families

Household type	Count	%
Married-couple family	312	53.3%
Cohabiting couple	11	1.9%
Male householder, no spouse	138	23.6%
Female householder, no spouse	124	21.2%
Households with children under 18	107	18.3%
Households with seniors (65+)	275	47.0%
Average household size	2.09

Marital status

Status	Male	Female
Never married	19.0%	4.6%
Married	60.9%	62.6%
Separated	2.4%	1.5%
Widowed	4.2%	21.6%
Divorced	13.5%	9.7%

Education

Less than 9th grade 5.1%

Some HS, no diploma 4.3%

HS graduate 34.2%

Some college, no degree 16.9%

Associate's degree 13.0%

Bachelor's degree 18.4%

Graduate / professional 8.1%

Metric	%
HS diploma or higher	90.6%
Bachelor's or higher	26.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	5	2.4%
Kindergarten	15	7.1%
Elementary school	139	65.9%
High school	38	18.0%
College / grad school	14	6.6%

Employment

Industry of employment

Education & healthcare 35.3%

Retail trade 10.4%

Manufacturing 10.0%

Public administration 9.0%

Finance & real estate 7.5%

Transportation & utilities 5.9%

Agriculture & mining 5.8%

Arts, food & hospitality 4.4%

Professional & management 4.2%

Wholesale trade 3.9%

Construction 2.9%

Other services 0.5%

Information 0.2%

Occupation

Category	%
Management, business & arts	38.2%
Service	19.5%
Sales & office	16.8%
Natural resources & construction	12.2%
Production & transportation	13.2%

Employment type

Type	%
Private sector	69.1%
Government	25.1%
Self-employed	5.1%
Unpaid family workers	0.7%

Commute

Method	%
Drive alone	82.5%
Carpool	6.2%
Public transit	1.4%
Walk	4.8%
Work from home	4.0%
Other means	1.2%
Avg commute (minutes)	17.7

Poverty

All people 9.3%

Under 18 years 5.3%

18 and over 10.4%

Married-couple families 3.2%

Female-led households 0.0%

Income support

Source	% of households
Social Security	48.9%
Retirement income	27.4%
Supplemental Security	8.7%
Cash public assistance	0.5%
Food stamps / SNAP	3.1%

Health indicators

Condition	%
Obesity	35.1%
High blood pressure	37.4%
High cholesterol	34.1%
Diabetes	11.6%
Heart disease	9.6%
Stroke	4.4%
Asthma	9.0%
Arthritis	30.5%
Kidney disease	4.0%
Pulmonary disease	8.2%
Cancer	9.5%

Behavior / access	%
Smoking	19.0%
Binge drinking	16.6%
No physical activity	26.9%
Less than 7 hrs sleep	28.1%
Depression	15.0%
Fair or poor health	14.6%
Poor mental health	10.2%
Poor physical health	10.9%
No health insurance	12.4%
Visited doctor (checkup)	77.5%
Visited dentist	62.6%
Cholesterol screening	90.8%
Teeth loss	16.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	166	15.9%

Disability	%
Any disability	17.0%
Under 18	3.3%
18–64 years	12.3%
65 and over	33.3%

Health insurance coverage

Type	%
Private insurance	77.0%
Public insurance	40.6%
No insurance	7.1%
Uninsured under 19	18.1%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,237	95.6%
Spanish	5	0.4%
Other Indo-European	0	0.0%
Asian & Pacific Islander	5	0.4%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,286	99.4%
Born in same state	1,282	99.1%
Born in different state	1,073	82.9%
Foreign born	4	0.3%
Naturalized citizen	8	0.6%
Not a US citizen	8	100.0%

Ancestry

Ancestry	Count	%
Italian	140	10.8%
French	111	8.6%
English	63	4.9%
Polish	28	2.2%

Ancestry	Count	%
Arab	17	1.3%
Dutch	16	1.2%
Irish	2	0.2%

Technology access

Metric	% of households
Computer access	45.2%
Internet access	79.0%

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

Frequently asked questions about ZIP code 57066

What city is ZIP code 57066 in?

ZIP code 57066 is primarily assigned to Tyndall, South Dakota.

What county is ZIP code 57066 in?

ZIP code 57066 falls within Bon Homme County, South Dakota.

Does ZIP code 57066 have an older population?

35% of residents in ZIP code 57066 are 65 or older, above the national average of ~17%.

Does ZIP code 57066 have a large retiree population?

49% of households in ZIP code 57066 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 57066 have a large veteran population?

16% of civilians in ZIP code 57066 are veterans, above the national average of ~7%.

What is the typical home value in ZIP code 57066?

The median home value in ZIP code 57066 is $103,800.

What timezone is ZIP code 57066 in?

ZIP code 57066 observes the CST timezone.