57345 ZIP Code — Highmore, SD

Hyde County, South Dakota

ZIP code 57345 is located in Highmore, South Dakota, within Hyde County. It covers approximately 646.28 square miles and serves a population of 1,094 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.

About ZIP code 57345

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 $91,300. Owner-occupancy is high at 85%, well above the national average.

Median household income is $71,397. The poverty rate of 6% is below the national average. 45% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry. The average commute of 13 minutes is near the national average.

College attainment at 18% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 57345 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

1,094
population
646.28
sq mi land
Standard
ZIP type
Central (CT)
timezone
57345 ZIP code map
Cities in ZIP code 57345

Below are the cities the US Postal Service accepts for ZIP code 57345. Using any city not on this list may result in mail delivery delays.

City Status
Highmore Acceptable
Highmore Preferred
Nearby ZIP codes
57371 Ree Heights (15.2 mi) 57536 Harrold (15.9 mi)
Demographics updated 05/2026
Population
Total population 1,094
Population density 2 / sq mi
State FIPS 46
County FIPS 069
Geography
Land area 646.28 sq mi
Water area 2.86 sq mi
Latitude 44.5451
Longitude -99.4874
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 37.0% 38.6% 41.7%
$50k – $100k 35.1% 36.6% 33.8%
$100k – $200k 25.8% 22.1% 20.1%
Over $200k 2.1% 2.8% 4.4%

Demographics & statistics

1,094
Population
2
People per sq mi
45.3
Median age
$71,397
Median household income
$35,360
Per capita income
$91,300
Median home value
$863
Median monthly rent
84.8%
Home ownership
6.0%
Poverty rate
0.9%
Unemployment
470
Housing units
18.4%
Bachelor's or higher

Age distribution

Male Female
42
Under 5
39
39
5–9
36
34
10–14
32
23
15–19
21
7
20–24
7
64
25–34
60
70
35–44
66
44
45–54
42
30
55–59
29
57
60–64
53
72
65–74
68
55
75–84
51
27
85+
26
← Male
Female →

Age summary

GroupCount%
Under 1826023.8%
18 and over83476.2%
65 and over29927.3%
Median age45.3 years

Race & ethnicity

White 88.3%
Two or more races 7.2%
Hispanic or Latino 4.5%
GroupCount%
White1,01188.3%
Two or more races837.2%
Hispanic or Latino514.5%

Household income

Income range This ZIP County avg State avg
Under $50k 37.0% 38.6% 41.7%
$50k – $100k 35.1% 36.6% 33.8%
$100k – $200k 25.8% 22.1% 20.1%
Over $200k 2.1% 2.8% 4.4%
Under $10k 1.3%
$10k–$15k 1.8%
$15k–$25k 6.6%
$25k–$35k 7.3%
$35k–$50k 13.5%
$50k–$75k 22.3%
$75k–$100k 20.8%
$100k–$150k 15.0%
$150k–$200k 8.4%
$200k+ 3.1%
Range% of households
Under $10k1.3%
$10k–$15k1.8%
$15k–$25k6.6%
$25k–$35k7.3%
$35k–$50k13.5%
$50k–$75k22.3%
$75k–$100k20.8%
$100k–$150k15.0%
$150k–$200k8.4%
$200k+3.1%
Median income$71,397

Housing

Home values

Under $50k 18.2%
$50k–$100k 38.8%
$100k–$150k 17.4%
$150k–$200k 6.0%
$200k–$300k 9.6%
$300k–$500k 8.6%
$500k–$1M 1.3%

Housing overview

MetricValue
Median home value$91,300
Median rent / month$863
Owner occupied84.8%
Renter occupied15.2%
Vacant16.0%
Single-family detached87.9%
Large apartment buildings0.0%
Mobile homes9.5%
Median rooms6.2
Avg household size (owned)2.32

Year built

Era%
2020 or later0.0%
2010–20193.0%
2000–20092.0%
1990–19997.8%
1980–19894.1%
1970–197912.1%
1960–196916.7%
1950–195915.6%
1940–19496.1%
1939 or earlier32.7%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom5.6%
2 bedrooms23.9%
3 bedrooms46.4%
4 bedrooms15.6%
5+ bedrooms8.5%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle16.6%
2 vehicles43.9%
3 or more39.5%

Heating fuel

Fuel type%
Utility gas0.9%
Electricity43.5%
Propane / LP gas39.7%
Fuel oil7.3%
Solar2.2%

Households & families

Household typeCount%
Married-couple family28963.8%
Cohabiting couple388.4%
Male householder, no spouse449.7%
Female householder, no spouse8218.1%
Households with children under 1813429.6%
Households with seniors (65+)18140.0%
Average household size2.32

Marital status

StatusMaleFemale
Never married22.2%14.6%
Married68.8%62.2%
Separated2.5%1.8%
Widowed0.0%13.9%
Divorced6.5%7.5%

Education

Less than 9th grade 3.4%
Some HS, no diploma 6.8%
HS graduate 31.2%
Some college, no degree 17.8%
Associate's degree 22.4%
Bachelor's degree 16.1%
Graduate / professional 2.3%
Metric%
HS diploma or higher89.8%
Bachelor's or higher18.4%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool2511.1%
Kindergarten177.6%
Elementary school10546.7%
High school4821.3%
College / grad school3013.3%

Employment

Industry of employment

Agriculture & mining 24.2%
Education & healthcare 20.5%
Retail trade 9.1%
Information 7.7%
Arts, food & hospitality 6.2%
Other services 5.7%
Transportation & utilities 5.2%
Construction 4.8%
Public administration 4.8%
Wholesale trade 3.9%
Manufacturing 3.0%
Finance & real estate 2.7%
Professional & management 2.1%

Occupation

Category%
Management, business & arts41.7%
Service11.6%
Sales & office14.1%
Natural resources & construction17.8%
Production & transportation14.8%

Employment type

Type%
Private sector59.0%
Government19.3%
Self-employed20.1%
Unpaid family workers1.6%

Commute

Method%
Drive alone74.2%
Carpool7.0%
Public transit1.8%
Walk5.9%
Work from home9.3%
Other means1.8%
Avg commute (minutes)13.1

Poverty

All people 6.0%
Under 18 years 6.9%
18 and over 5.7%
Married-couple families 0.0%
Female-led households 40.0%

Income support

Source% of households
Social Security44.8%
Retirement income13.9%
Supplemental Security6.2%
Cash public assistance0.7%
Food stamps / SNAP3.3%

Health indicators

Condition%
Obesity31.2%
High blood pressure35.0%
High cholesterol33.7%
Diabetes9.9%
Heart disease8.2%
Stroke3.6%
Asthma8.4%
Arthritis27.0%
Kidney disease3.4%
Pulmonary disease6.4%
Cancer9.2%
Behavior / access%
Smoking15.3%
Binge drinking17.8%
No physical activity23.1%
Less than 7 hrs sleep26.1%
Depression14.0%
Fair or poor health11.3%
Poor mental health9.5%
Poor physical health8.9%
No health insurance11.1%
Visited doctor (checkup)77.4%
Visited dentist70.3%
Cholesterol screening90.8%
Teeth loss12.8%

Veterans & disability

VeteransCount%
Civilian veterans627.4%
Disability%
Any disability10.6%
Under 186.5%
18–64 years6.4%
65 and over23.4%

Health insurance coverage

Type%
Private insurance76.1%
Public insurance32.5%
No insurance4.6%
Uninsured under 196.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,01392.6%
Spanish00.0%
Other Indo-European00.0%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,094100.0%
Born in same state1,094100.0%
Born in different state85478.1%
Foreign born00.0%
Naturalized citizen00.0%
Not a US citizen00.0%

Ancestry

AncestryCount%
Polish13412.2%
Italian11810.8%
French857.8%
Arab635.8%
AncestryCount%
English131.2%
Dutch30.3%
German10.1%

Technology access

Metric% of households
Computer access41.4%
Internet access90.5%

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

Frequently asked questions about ZIP code 57345

What city is ZIP code 57345 in?

ZIP code 57345 is primarily assigned to Highmore, South Dakota.

What county is ZIP code 57345 in?

ZIP code 57345 falls within Hyde County, South Dakota.

Does ZIP code 57345 have an older population?

27% of residents in ZIP code 57345 are 65 or older, above the national average of ~17%.

Is ZIP code 57345 mostly owner-occupied?

85% of occupied units in ZIP code 57345 are owner-occupied, well above the national average.

Does ZIP code 57345 have a large retiree population?

45% of households in ZIP code 57345 receive Social Security income, suggesting a significant retiree or disability population.

What is the typical home value in ZIP code 57345?

The median home value in ZIP code 57345 is $91,300.

What timezone is ZIP code 57345 in?

ZIP code 57345 observes the CST timezone.

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