Mackay

County:: Custer County
County Seat:: No
Area (mi²):: 0.866
State:: Idaho

Mackay is a city located in Custer County, Idaho. Mackay has a 2025 population of 504. Mackay is currently growing at a rate of 2.44% annually and its population has increased by 13.51% since the most recent census, which recorded a population of 444 in 2020.

The average household income in Mackay is $62,664 with a poverty rate of 17.8%.The median age in Mackay is 61.1 years: 62.1 years for males, and 52.7 years for females.

Demographics

The racial composition of Mackay includes 89.15% White, and smaller percentages for Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	641	89.15%
Two or more races	77	10.71%
Native American	1	0.14%

Mackay Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Mackay's average per capita income is $34,650. Household income levels show a median of $41,474. The poverty rate stands at 17.8%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Families	$45,729	$60,192
Married Families	$42,051	-
Households	$41,474	$62,664
Non Families	$33,050	$65,502

$34,650

Average Income

$41,474

Median Household Income

17.8%

Poverty Rate