Mackay, ID Profile: Facts & Data


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Mackay, Idaho - Basic Facts

The City of Mackay had a population of 538 as of July 1, 2020. Mackay ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Idaho. See peer rankings below.

The primary coordinate point for Mackay is located at latitude 43.9146 and longitude -113.6134 in Custer County. The formal boundaries for the City of Mackay encompass a land area of 0.86 sq. miles and a water area of 0 sq. miles. Custer County is in the Mountain time zone (GMT -7). The elevation is 5,905 feet.

The City of Mackay (GNIS ID: 2410905) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Idaho is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Mackay is located within Mackay Division of Custer County.

Alternate Unofficial Names for Mackay: Carbonate.


Mackay, ID Data & Demographics (As of July 1, 2020)


Total Population 538 (100%)
Population in Households 538 (100.0%)
Population in Families 417 (77.5%)
Population in Group Quarters1 0
Population Density 621
Diversity Index2 13


Median Household Income $52,668
Average Household Income $64,885
% of Income for Mortgage4 15%
Per Capita Income $27,851
Wealth Index5 63


Total HU (Housing Units) 371 (100%)
Owner Occupied HU 173 (46.6%)
Renter Occupied HU 87 (23.5%)
Vacant Housing Units 110 (29.6%)
Median Home Value $186,029
Average Home Value $293,642
Housing Affordability Index3 184


Total Households 261
Average Household Size 2.06
Family Households 171
Average Family Size 2
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population 0.39% 0.19%
Households 0.54% 0.23%
Families 2.19% 0.12%
Median Household Income   1.88%
Per Capita Income   2.58%
Owner Occupied HU   0.23%


Mackay, ID - Peer Comparisons by Rank and Percentile

The table below compares Mackay to the other 227 incorporated cities, towns and CDPs in Idaho by rank and percentile using July 1, 2020 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 134 41st
Population Density # 151 34th
Median Household Income # 93 59th
Housing Affordability Index # 162 71st
Per Capita Income # 64 72nd
Diversity Index # 203 11th

Additional comparisons and rankings can be made with a VERY EASY TO USE Idaho Census Data Comparison Tool.

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