Chelsea is a city located in Massachusetts. With a 2020 population of 40,250, it is the 36th largest city in Massachusetts and the 976th largest city in the United States. Chelsea is currently growing at a rate of 0.11% annually and its population has increased by 14.42% since the most recent census, which recorded a population of 35,177 in 2010. Chelsea reached it's highest population of 45,816 in 1930. Spanning over 2 miles, Chelsea has a population density of 18,169 people per square mile.
The average household income in Chelsea is $68,101 with a poverty rate of 18.76%. The median rental costs in recent years comes to $1,361 per month, and the median house value is $323,400. The median age in Chelsea is 33.2 years, 33.1 years for males, and 33.4 years for females. For every 100 females there are 104.3 males.