Peabody, MA has a population of 51,868 and is the 762nd largest city in the United States. The population density is 3,199 per sq mi which is 281% higher than the Massachusetts average and 3431% higher than the national average. The median age in Peabody is 45 which is approximately 14% higher than the Massachusetts average of 39. In Peabody, 61% of the population over 15 years of age are married, 79% speak English and 6% speak Spanish. 73% of Peabody residents were born in Massachusetts, 10% were born out of state, 1% were born outside of the United States and 16% were foreign born.