Irwin is a city located in Bonneville County Idaho. With a 2020 population of 249, it is the 163rd largest city in Idaho and the 15972nd largest city in the United States . Irwin is currently growing at a rate of 0.40% annually and its population has increased by 13.70% since the most recent census, which recorded a population of 219 in 2010. Irwin reached it's highest population of 249 in 2021. Spanning over 2 miles, Irwin has a population density of 101 people per square mile.
The average household income in Irwin is $58,847 with a poverty rate of 4.64%. The median rental costs in recent years comes to $484 per month, and the median house value is $188,800. The median age in Irwin is 59.6 years, 62.3 years for males, and 50.5 years for females.