Lewistown is a city located in Fulton County Illinois. Lewistown has a 2020 population of 2,691. It is also the county seat of Fulton County. Lewistown is currently declining at a rate of -1.54% annually and its population has decreased by -11.45% since the most recent census, which recorded a population of 3,039 in 2010. Lewistown reached it's highest population of 3,039 in 2010.
The average household income in Lewistown is $70,161 with a poverty rate of 14.70%. The median rental costs in recent years comes to $570 per month, and the median house value is $88,700. The median age in Lewistown is 45.7 years, 41.9 years for males, and 47.7 years for females.