Los Altos, TX has a population of 122 and is the 26,337th largest city in the United States. The population density is 3,208 per sq mi which is 3209% higher than the Texas average and 3441% higher than the national average. The median age in Los Altos is 8 which is approximately 77% lower than the Texas average of 34. In Los Altos, 0% of the population over 15 years of age are married, 0% speak English and 100% speak Spanish. 72% of Los Altos residents were born in Texas, 0% were born out of state, 0% were born outside of the United States and 28% were foreign born.