Potomac is located in Illinois. Potomac, Illinois has a population of 648. Potomac is more family-centric than the surrounding county with 32% households with children. The county percentage for households with children is 27%.
The median household income in Potomac, Illinois is $57,826. The median household income for the surrounding county is $48,074 compared to the national median of $66,222. The median age of people living in Potomac is 42.6 years.
The average high temperature in July is 85.88 degrees, with an average low temperature in January of 17.37 degrees. The annual precipitation is 39.53.