Gilberts, IL has a population of 7,479 and is the 4,945th largest city in the United States. The population density is 1,351 per sq mi which is 508% higher than the Illinois average and 1391% higher than the national average. The median age in Gilberts is 32 which is approximately 14% lower than the Illinois average of 37. In Gilberts, 71% of the population over 15 years of age are married, 68% speak English and 8% speak Spanish. 61% of Gilberts residents were born in Illinois, 14% were born out of state, 1% were born outside of the United States and 24% were foreign born.