Lago Vista CDP, TX has a population of 71 and is the 27,620th largest city in the United States. The population density is 161 per sq mi which is 66% higher than the Texas average and 78% higher than the national average. The median age in Lago Vista CDP is 23 which is approximately 34% lower than the Texas average of 34. In Lago Vista CDP, 74% of the population over 15 years of age are married, 50% speak English and 50% speak Spanish. 83% of Lago Vista CDP residents were born in Texas, 8% were born out of state, 0% were born outside of the United States and 8% were foreign born.