Lake Worth, TX has a population of 4,757 and is the 6,681st largest city in the United States. The population density is 1,931 per sq mi which is 1892% higher than the Texas average and 2031% higher than the national average. The median age in Lake Worth is 41 which is approximately 20% higher than the Texas average of 34. In Lake Worth, 60% of the population over 15 years of age are married, 83% speak English and 17% speak Spanish. 71% of Lake Worth residents were born in Texas, 20% were born out of state, 0% were born outside of the United States and 8% were foreign born.