Smithboro, IL has a population of 171 and is the 25,118th largest city in the United States. The population density is 184 per sq mi which is 17% lower than the Illinois average and 103% higher than the national average. The median age in Smithboro is 35 which is approximately 7% lower than the Illinois average of 37. In Smithboro, 66% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 81% of Smithboro residents were born in Illinois, 19% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Smithboro is 17% lower than Illinois.
The median age in Smithboro is 7% lower than Illinois.
In Smithboro 100.00% of the population is White.
In Smithboro 0.00% of the population is Black or African American.