Grafton is a city located in Jersey County Illinois. With a 2020 population of 634, it is the 793rd largest city in Illinois and the 12290th largest city in the United States . Grafton is currently declining at a rate of -0.47% annually and its population has decreased by -5.93% since the most recent census, which recorded a population of 674 in 2010. Grafton reached it's highest population of in . Spanning over 4 miles, Grafton has a population density of 171 people per square mile.
The average household income in Grafton is $66,890 with a poverty rate of 23.17%. The median rental costs in recent years comes to $554 per month, and the median house value is $194,900. The median age in Grafton is 58.3 years, 59.1 years for males, and 57 years for females.