Hemphill, TX has a population of 1,622 and is the 12,257th largest city in the United States. The population density is 639 per sq mi which is 559% higher than the Texas average and 605% higher than the national average. The median age in Hemphill is 37 which is approximately 9% higher than the Texas average of 34. In Hemphill, 47% of the population over 15 years of age are married, 84% speak English and 15% speak Spanish. 79% of Hemphill residents were born in Texas, 18% were born out of state, 0% were born outside of the United States and 2% were foreign born.