83251 ZIP Code — Mackay, ID

Custer County, Idaho

ZIP code 83251 is located in Mackay, Idaho, within Custer County. It covers approximately 1,124.15 square miles and serves a population of 1,286 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 208.

About ZIP code 83251

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $301,500. Owner-occupancy is high at 86%, well above the national average.

Median household income is $67,553. 53% 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 19 minutes is near the national average.

Educational attainment is near the national average, with 30% of residents holding a bachelor's degree or higher.

Overall, ZIP code 83251 reflects a community defined by high homeownership and a significant Social Security-dependent population.

1,286

population

1,124.15

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

83251 ZIP code map

Cities in ZIP code 83251

Below are the cities the US Postal Service accepts for ZIP code 83251. Using any city not on this list may result in mail delivery delays.

City	Status
Mackay	Acceptable
Mackay	Preferred

Demographics updated 06/2026

Population
Total population	1,286
Population density	1,286 / sq mi
State FIPS	16
County FIPS	037

Geography
Land area	1,124.15 sq mi
Water area	2.97 sq mi
Latitude	43.9223
Longitude	-113.8895
Timezone	Mountain (MT)
Area code	208

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	49.7%	60.4%	41.8%
$50k – $100k	33.9%	26.9%	34.0%
$100k – $200k	16.5%	12.7%	19.5%
Over $200k	0.0%	0.0%	4.7%

Demographics & statistics

1,286

Population

1,286

People per sq mi

57.5

Median age

$67,553

Median household income

$33,920

Per capita income

$301,500

Median home value

$979

Median monthly rent

85.8%

Home ownership

10.7%

Poverty rate

5.4%

Unemployment

844

Housing units

30.3%

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

105

60–64

112

105

65–74

113

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	164	12.8%
18 and over	1,122	87.2%
65 and over	350	27.2%
Median age	57.5 years

Race & ethnicity

White 83.5%

Two or more races 13.6%

Hispanic or Latino 2.6%

American Indian / Alaska Native 0.2%

Other race 0.2%

Group	Count	%
White	1,102	83.5%
Two or more races	179	13.6%
Hispanic or Latino	34	2.6%
American Indian / Alaska Native	3	0.2%
Other race	2	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	49.7%	60.4%	41.8%
$50k – $100k	33.9%	26.9%	34.0%
$100k – $200k	16.5%	12.7%	19.5%
Over $200k	0.0%	0.0%	4.7%

Under $10k 4.0%

$10k–$15k 1.6%

$15k–$25k 11.1%

$25k–$35k 11.5%

$35k–$50k 9.7%

$50k–$75k 22.6%

$75k–$100k 14.9%

$100k–$150k 7.5%

$150k–$200k 12.8%

$200k+ 4.3%

Range	% of households
Under $10k	4.0%
$10k–$15k	1.6%
$15k–$25k	11.1%
$25k–$35k	11.5%
$35k–$50k	9.7%
$50k–$75k	22.6%
$75k–$100k	14.9%
$100k–$150k	7.5%
$150k–$200k	12.8%
$200k+	4.3%
Median income	$67,553

Housing

Home values

Under $50k 6.3%

$50k–$100k 1.6%

$100k–$150k 11.1%

$150k–$200k 11.1%

$200k–$300k 19.4%

$300k–$500k 32.0%

$500k–$1M 12.6%

$1M+ 5.9%

Housing overview

Metric	Value
Median home value	$301,500
Median rent / month	$979
Owner occupied	85.8%
Renter occupied	14.2%
Vacant	37.8%
Single-family detached	90.9%
Large apartment buildings	0.0%
Mobile homes	6.8%
Median rooms	5.8
Avg household size (owned)	2.12

Year built

Era	%
2020 or later	0.0%
2010–2019	3.1%
2000–2009	21.2%
1990–1999	17.3%
1980–1989	15.0%
1970–1979	16.3%
1960–1969	4.9%
1950–1959	4.6%
1940–1949	1.9%
1939 or earlier	15.7%

Bedrooms

Size	% of units
No bedroom (studio)	2.3%
1 bedroom	9.1%
2 bedrooms	22.1%
3 bedrooms	41.3%
4 bedrooms	16.7%
5+ bedrooms	8.5%

Vehicles per household

Vehicles	% of households
No vehicle	1.6%
1 vehicle	13.5%
2 vehicles	35.9%
3 or more	49.0%

Heating fuel

Fuel type	%
Utility gas	1.9%
Electricity	61.5%
Propane / LP gas	9.0%
Fuel oil	0.7%
Wood	25.0%
No fuel used	1.4%

Households & families

Household type	Count	%
Married-couple family	369	64.1%
Cohabiting couple	12	2.1%
Male householder, no spouse	85	14.8%
Female householder, no spouse	110	19.1%
Households with children under 18	57	9.9%
Households with seniors (65+)	252	43.8%
Average household size	2.19

Marital status

Status	Male	Female
Never married	17.1%	13.6%
Married	62.5%	62.1%
Separated	0.0%	3.7%
Widowed	1.4%	14.2%
Divorced	19.0%	6.5%

Education

Less than 9th grade 0.0%

Some HS, no diploma 4.8%

HS graduate 36.5%

Some college, no degree 20.1%

Associate's degree 8.3%

Bachelor's degree 17.0%

Graduate / professional 13.3%

Metric	%
HS diploma or higher	95.2%
Bachelor's or higher	30.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	58	33.1%
Kindergarten	0	0.0%
Elementary school	61	34.9%
High school	14	8.0%
College / grad school	42	24.0%

Employment

Industry of employment

Education & healthcare 25.3%

Professional & management 16.3%

Agriculture & mining 15.5%

Construction 11.5%

Transportation & utilities 8.3%

Finance & real estate 8.3%

Information 3.5%

Manufacturing 2.8%

Retail trade 2.8%

Public administration 2.8%

Arts, food & hospitality 1.3%

Wholesale trade 1.0%

Other services 1.0%

Occupation

Category	%
Management, business & arts	46.3%
Service	18.0%
Sales & office	18.0%
Natural resources & construction	13.5%
Production & transportation	4.3%

Employment type

Type	%
Private sector	53.8%
Government	31.0%
Self-employed	15.3%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	58.7%
Carpool	13.0%
Public transit	6.0%
Walk	3.9%
Work from home	10.1%
Other means	8.3%
Avg commute (minutes)	19.1

Poverty

All people 10.7%

Under 18 years 4.9%

18 and over 11.6%

Married-couple families 6.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	52.8%
Retirement income	42.5%
Supplemental Security	5.2%
Cash public assistance	2.6%
Food stamps / SNAP	2.3%

Health indicators

Condition	%
Obesity	32.0%
High blood pressure	37.9%
High cholesterol	37.4%
Diabetes	12.4%
Heart disease	9.0%
Stroke	4.1%
Asthma	9.7%
Arthritis	29.5%
Kidney disease	3.7%
Pulmonary disease	8.7%
Cancer	8.3%

Behavior / access	%
Smoking	17.5%
Binge drinking	13.5%
No physical activity	23.4%
Less than 7 hrs sleep	29.5%
Depression	18.0%
Fair or poor health	16.4%
Poor mental health	12.9%
Poor physical health	12.6%
No health insurance	15.0%
Visited doctor (checkup)	71.8%
Visited dentist	57.6%
Cholesterol screening	89.2%
Teeth loss	15.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	57	5.1%

Disability	%
Any disability	21.9%
Under 18	0.0%
18–64 years	17.7%
65 and over	41.4%

Health insurance coverage

Type	%
Private insurance	75.0%
Public insurance	41.8%
No insurance	2.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,215	94.5%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,282	99.7%
Born in same state	1,278	99.4%
Born in different state	675	52.5%
Foreign born	4	0.3%
Naturalized citizen	4	0.3%
Not a US citizen	3	75.0%

Ancestry

Ancestry	Count	%
French	387	30.1%
Italian	137	10.7%
English	59	4.6%

Ancestry	Count	%
Arab	44	3.4%
Polish	32	2.5%
Irish	1	0.1%

Technology access

Metric	% of households
Computer access	44.8%
Internet access	86.6%

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

Frequently asked questions about ZIP code 83251

What city is ZIP code 83251 in?

ZIP code 83251 is primarily assigned to Mackay, Idaho.

What county is ZIP code 83251 in?

ZIP code 83251 falls within Custer County, Idaho.

Does ZIP code 83251 have a large retiree population?

53% of households in ZIP code 83251 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 83251 have an older population?

27% of residents in ZIP code 83251 are 65 or older, above the national average of ~17%.

Is ZIP code 83251 mostly owner-occupied?

86% of occupied units in ZIP code 83251 are owner-occupied, well above the national average.

What is the population of ZIP code 83251?

ZIP code 83251 has an estimated population of 1,286 residents, with a density of 1 people per square mile.

What timezone is ZIP code 83251 in?

ZIP code 83251 observes the MST timezone.