Beach Park, IL has a population of 13,788 and is the 3,031st largest city in the United States. The population density is 1,950 per sq mi which is 777% higher than the Illinois average and 2052% higher than the national average. The median age in Beach Park is 39 which is approximately 5% higher than the Illinois average of 37. In Beach Park, 61% of the population over 15 years of age are married, 74% speak English and 21% speak Spanish. 65% of Beach Park residents were born in Illinois, 20% were born out of state, 1% were born outside of the United States and 14% were foreign born.