St. Ignatius is a city located in Montana. With a 2020 population of 854, it is the 65th largest city in Montana and the 10981st largest city in the United States. St. Ignatius is currently growing at a rate of 1.43% annually and its population has increased by 1.43% since the most recent census, which recorded a population of 842 in 2010. Spanning over 1 miles, St. Ignatius has a population density of 1,602 people per square mile.
The average household income in St. Ignatius is $39,818 with a poverty rate of 30.70%. The median rental costs in recent years comes to $773 per month, and the median house value is $121,700. The median age in St. Ignatius is 37.6 years, 36.3 years for males, and 39.5 years for females. For every 100 females there are 88.9 males.