Olmsted, IL has a population of 435 and is the 20,408th largest city in the United States. The population density is 129 per sq mi which is 42% lower than the Illinois average and 43% higher than the national average. The median age in Olmsted is 43 which is approximately 16% higher than the Illinois average of 37. In Olmsted, 63% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 65% of Olmsted residents were born in Illinois, 34% were born out of state, 0% were born outside of the United States and 2% were foreign born.
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The population density in Olmsted is 42% lower than Illinois.
The median age in Olmsted is 16% higher than Illinois.
In Olmsted 84.60% of the population is White.
In Olmsted 14.02% of the population is Black or African American.