Palatine, IL has a population of 69,098 and is the 529th largest city in the United States. The population density is 5,074 per sq mi which is 2182% higher than the Illinois average and 5500% higher than the national average. The median age in Palatine is 38 which is approximately equal to the Illinois average of 37. In Palatine, 59% of the population over 15 years of age are married, 66% speak English and 15% speak Spanish. 60% of Palatine residents were born in Illinois, 14% were born out of state, 1% were born outside of the United States and 25% were foreign born.