Highwood, IL has a population of 5,377 and is the 6,154th largest city in the United States. The population density is 7,466 per sq mi which is 3259% higher than the Illinois average and 8141% higher than the national average. The median age in Highwood is 36 which is approximately 5% lower than the Illinois average of 37. In Highwood, 54% of the population over 15 years of age are married, 46% speak English and 45% speak Spanish. 55% of Highwood residents were born in Illinois, 13% were born out of state, 2% were born outside of the United States and 31% were foreign born.