Ohlman, IL has a population of 113 and is the 26,584th largest city in the United States. The population density is 294 per sq mi which is 32% higher than the Illinois average and 224% higher than the national average. The median age in Ohlman is 38 which is approximately 2% higher than the Illinois average of 37. In Ohlman, 70% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 97% of Ohlman residents were born in Illinois, 3% were born out of state, 0% were born outside of the United States and 0% were foreign born.