Ovilla, TX has a population of 3,639 and is the 7,865th largest city in the United States. The population density is 629 per sq mi which is 549% higher than the Texas average and 594% higher than the national average. The median age in Ovilla is 42 which is approximately 23% higher than the Texas average of 34. In Ovilla, 79% of the population over 15 years of age are married, 93% speak English and 4% speak Spanish. 64% of Ovilla residents were born in Texas, 33% were born out of state, 1% were born outside of the United States and 2% were foreign born.