Port Lavaca, TX has a population of 12,374 and is the 3,332nd largest city in the United States. The population density is 1,219 per sq mi which is 1158% higher than the Texas average and 1246% higher than the national average. The median age in Port Lavaca is 36 which is approximately 4% higher than the Texas average of 34. In Port Lavaca, 52% of the population over 15 years of age are married, 65% speak English and 28% speak Spanish. 74% of Port Lavaca residents were born in Texas, 13% were born out of state, 1% were born outside of the United States and 12% were foreign born.