Highland Park, TX has a population of 8,986 and is the 4,270th largest city in the United States. The population density is 4,006 per sq mi which is 4033% higher than the Texas average and 4322% higher than the national average. The median age in Highland Park is 46 which is approximately 35% higher than the Texas average of 34. In Highland Park, 72% of the population over 15 years of age are married, 92% speak English and 4% speak Spanish. 55% of Highland Park residents were born in Texas, 38% were born out of state, 1% were born outside of the United States and 6% were foreign born.