Dorchester, IL has a population of 133 and is the 26,081st largest city in the United States. The population density is 185 per sq mi which is 17% lower than the Illinois average and 104% higher than the national average. The median age in Dorchester is 52 which is approximately 38% higher than the Illinois average of 37. In Dorchester, 75% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 88% of Dorchester residents were born in Illinois, 12% 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 Dorchester is 17% lower than Illinois.
The median age in Dorchester is 38% higher than Illinois.
In Dorchester 98.50% of the population is White.
In Dorchester 0.00% of the population is Black or African American.