Lavaca, AR has a population of 2,592 and is the 9,625th largest city in the United States. The population density is 1,167 per sq mi which is 2004% higher than the Arkansas average and 1188% higher than the national average. The median age in Lavaca is 33 which is approximately 14% lower than the Arkansas average of 38. In Lavaca, 71% of the population over 15 years of age are married, 94% speak English and 6% speak Spanish. 63% of Lavaca residents were born in Arkansas, 32% were born out of state, 1% were born outside of the United States and 4% were foreign born.