Oblong is a city located in Crawford County Illinois. With a 2020 population of 1,345, it is the 571st largest city in Illinois and the 9129th largest city in the United States . Oblong is currently declining at a rate of -0.96% annually and its population has decreased by -8.25% since the most recent census, which recorded a population of 1,466 in 2010. Oblong reached it's highest population of in . Spanning over 1 miles, Oblong has a population density of 1,239 people per square mile.
The average household income in Oblong is $52,913 with a poverty rate of 24.64%. The median rental costs in recent years comes to $503 per month, and the median house value is $52,200. The median age in Oblong is 39.3 years, 42.5 years for males, and 36.3 years for females.