Hecker, IL has a population of 519 and is the 19,305th largest city in the United States. The population density is 2,055 per sq mi which is 824% higher than the Illinois average and 2168% higher than the national average. The median age in Hecker is 32 which is approximately 15% lower than the Illinois average of 37. In Hecker, 69% of the population over 15 years of age are married, 96% speak English and 1% speak Spanish. 65% of Hecker residents were born in Illinois, 32% were born out of state, 0% were born outside of the United States and 3% were foreign born.