Lanark is located in Illinois. Lanark, Illinois has a population of 1,571. Lanark is more family-centric than the surrounding county with 28.03% of the households containing married families with children. The county average for households married with children is 23.24%.
The median household income in Lanark, Illinois is $62,083. The median household income for the surrounding county is $54,959 compared to the national median of $69,021. The median age of people living in Lanark is 43.4 years.
The average high temperature in July is 84.2 degrees, with an average low temperature in January of 11.8 degrees. The average rainfall is approximately 38.5 inches per year, with 31.1 inches of snow per year.
