Warren, MA has a population of 1,228 and is the 13,892nd largest city in the United States. The population density is 964 per sq mi which is 53% higher than the Massachusetts average and 964% higher than the national average. The median age in Warren is 42 which is approximately 7% higher than the Massachusetts average of 39. In Warren, 47% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 90% of Warren residents were born in Massachusetts, 10% were born out of state, 0% were born outside of the United States and 0% were foreign born.