According to the United States Census Bureau of 2000, Herriman has a population of more than 1,500 people. The city has a total area of 9.1 square miles with a population density of over 100 people per square mile. It is located at high altitudes of over 5,000 feet above sea level.
The racial demographics of Herriman are 95.29% White, 0.59% African American, 0.30% Native American, 1.59% Asian, 0.35% Pacific Islander, 0.64% from other races, and 1.24% from two or more races. Hispanic or Latino of any race are 1.83% of the population.
Herriman has more than 400 households, many of them affluent. The median income for a household in the city is $56,361, and the median income for a family is $57,404.