Mackay is a city located in Custer County Idaho. With a 2020 population of 511, it is the 128th largest city in Idaho and the 13219th largest city in the United States . Mackay is currently growing at a rate of 0.99% annually but its population has decreased by -1.16% since the most recent census, which recorded a population of 517 in 2010. Mackay reached it's highest population of 511 in 2010. Spanning over 1 miles, Mackay has a population density of 590 people per square mile.
The average household income in Mackay is $47,938 with a poverty rate of 27.62%. The median rental costs in recent years comes to $620 per month, and the median house value is $145,100. The median age in Mackay is 42.7 years, 44 years for males, and 33.6 years for females.