Olivet, IL has a population of 243 and is the 23,577th largest city in the United States. The population density is 102 per sq mi which is 54% lower than the Illinois average and 13% higher than the national average. The median age in Olivet is 46 which is approximately 22% higher than the Illinois average of 37. In Olivet, 57% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 76% of Olivet residents were born in Illinois, 23% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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The population density in Olivet is 54% lower than Illinois.
The median age in Olivet is 22% higher than Illinois.
In Olivet 80.25% of the population is White.
In Olivet 1.65% of the population is Black or African American.