Port Neches, TX has a population of 12,794 and is the 3,247th largest city in the United States. The population density is 1,483 per sq mi which is 1429% higher than the Texas average and 1536% higher than the national average. The median age in Port Neches is 41 which is approximately 20% higher than the Texas average of 34. In Port Neches, 63% of the population over 15 years of age are married, 91% speak English and 4% speak Spanish. 75% of Port Neches residents were born in Texas, 19% were born out of state, 1% were born outside of the United States and 6% were foreign born.