Eureka is a city located in Montana. With a 2020 population of 1,418, it is the 48th largest city in Montana and the 8922nd largest city in the United States. Eureka is currently growing at a rate of 0.85% annually and its population has increased by 36.74% since the most recent census, which recorded a population of 1,037 in 2010. Spanning over 1 miles, Eureka has a population density of 1,069 people per square mile.
The average household income in Eureka is $47,779 with a poverty rate of 29.27%. The median rental costs in recent years comes to $734 per month, and the median house value is $173,400. The median age in Eureka is 51.7 years, 51.8 years for males, and 51.7 years for females. For every 100 females there are 83.6 males.