Pingree Grove, IL has a population of 5,983 and is the 5,769th largest city in the United States. The population density is 1,628 per sq mi which is 632% higher than the Illinois average and 1697% higher than the national average. The median age in Pingree Grove is 35 which is approximately 7% lower than the Illinois average of 37. In Pingree Grove, 59% of the population over 15 years of age are married, 93% speak English and 0% speak Spanish. 84% of Pingree Grove residents were born in Illinois, 9% were born out of state, 0% were born outside of the United States and 7% were foreign born.