Sierra Madre, CA has a population of 11,067 and is the 3,644th largest city in the United States. The population density is 3,748 per sq mi which is 1513% higher than the California average and 4037% higher than the national average. The median age in Sierra Madre is 45 which is approximately 25% higher than the California average of 36. In Sierra Madre, 62% of the population over 15 years of age are married, 83% speak English and 6% speak Spanish. 61% of Sierra Madre residents were born in California, 25% were born out of state, 1% were born outside of the United States and 13% were foreign born.