According to the United States Census Bureau of 2000, East Millcreek has a population of more than 25,000 people. The community has a total area of 4.5 square miles with a population density of over 4,800 people per square mile. It is located at high altitudes of over 4,500 feet above sea level.
The racial demographics of East Millcreek 95.04% White, 0.43% African American, 0.14% Native American, 1.45% Asian, 0.26% Pacific Islander, 1.08% from other races, and 1.59% from two or more races. Hispanic or Latino of any race are 2.74% of the population.
East Millcreek has more than 7,500 households, many of them affluent. The median income for a household in the is $57,678, and the median income for a family is $66,742.