Mackay Map
Mackay is a city in Custer County, Idaho, United States. The population was 566 at the 2000 census.
Mackay is located at 43°54?43?N 113°36?49?W / 43.91194°N 113.61361°W / 43.91194; -113.61361 (43.911880, -113.613669), at an elevation of 5,905 feet (1,800 m).
According to the United States Census Bureau, the city has a total area of 0.9 square miles (2.3 km²), all of it land.
Nearby cities include Moore.