Kingston, MA has a population of 6,276 and is the 5,591st largest city in the United States. The population density is 1,306 per sq mi which is 107% higher than the Massachusetts average and 1341% higher than the national average. The median age in Kingston is 41 which is approximately 4% higher than the Massachusetts average of 39. In Kingston, 65% of the population over 15 years of age are married, 93% speak English and 3% speak Spanish. 81% of Kingston residents were born in Massachusetts, 15% were born out of state, 0% were born outside of the United States and 4% were foreign born.