Smithfield is located in Illinois. Smithfield, Illinois has a population of 183. Smithfield is less family-centric than the surrounding county with 26% households with children. The county percentage for households with children is 26%.
The median household income in Smithfield, Illinois is $53,260. The median household income for the surrounding county is $53,713 compared to the national median of $66,222. The median age of people living in Smithfield is 46.9 years.
The average high temperature in July is 87.81 degrees, with an average low temperature in January of 14.19 degrees. The annual precipitation is 37.