Eureka is a city located in Montana. With a 2020 population of 1,144, it is the 53rd largest city in Montana and the 9786th largest city in the United States. Eureka is currently growing at a rate of 1.15% annually and its population has increased by 10.32% since the most recent census, which recorded a population of 1,037 in 2010. Spanning over 1 miles, Eureka has a population density of 863 people per square mile.
The average household income in Eureka is $48,192 with a poverty rate of 32.99%. The median rental costs in recent years comes to $707 per month, and the median house value is $156,100. The median age in Eureka is 58.4 years, 58.3 years for males, and 58.5 years for females. For every 100 females there are 82.5 males.