San Leanna, TX has a population of 606 and is the 18,382nd largest city in the United States. The population density is 1,364 per sq mi which is 1307% higher than the Texas average and 1406% higher than the national average. The median age in San Leanna is 49 which is approximately 43% higher than the Texas average of 34. In San Leanna, 68% of the population over 15 years of age are married, 86% speak English and 11% speak Spanish. 67% of San Leanna residents were born in Texas, 26% were born out of state, 2% were born outside of the United States and 4% were foreign born.