Boulder is a city located in Garfield County Utah. With a 2020 population of 253, it is the 228th largest city in Utah and the 15920th largest city in the United States . Boulder is currently growing at a rate of 2.43% annually and its population has increased by 11.95% since the most recent census, which recorded a population of 226 in 2010. Boulder reached it's highest population of in . Spanning over 21 miles, Boulder has a population density of 12 people per square mile.
The average household income in Boulder is $76,428 with a poverty rate of 8.15%. The median rental costs in recent years comes to $708 per month, and the median house value is $223,400. The median age in Boulder is 54 years, 56.2 years for males, and 49 years for females.