It was originally proposed to be included in the corporate limits of the city of Holladay, which was incorporated on November 29, 1999.

According to the United States Census Bureau, the CDP had a total area of 4.4 square miles (11.5 km2), all of it land.

20.7% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older.

The historic name of the area is "East Mill Creek", as three distinct words.

Although the variant "East Millcreek" currently is widely used, the community council and several other local entities retain the original usage.