Northlake, TX has a population of 2,894 and is the 8,990th largest city in the United States. The population density is 172 per sq mi which is 77% higher than the Texas average and 89% higher than the national average. The median age in Northlake is 30 which is approximately 13% lower than the Texas average of 34. In Northlake, 46% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 59% of Northlake residents were born in Texas, 38% were born out of state, 1% were born outside of the United States and 2% were foreign born.