Ullin is a city located in Pulaski County Illinois. With a 2020 population of 384, it is the 953rd largest city in Illinois and the 14415th largest city in the United States . Ullin is currently declining at a rate of -2.04% annually and its population has decreased by -17.06% since the most recent census, which recorded a population of 463 in 2010. Ullin reached it's highest population of in . Spanning over 3 miles, Ullin has a population density of 137 people per square mile.
The average household income in Ullin is $58,279 with a poverty rate of 19.69%. The median rental costs in recent years comes to $604 per month, and the median house value is $71,300. The median age in Ullin is 41.2 years, 42.1 years for males, and 36.8 years for females.