Fitchburg is a city located in Massachusetts. With a 2020 population of 41,122, it is the 33rd largest city in Massachusetts and the 953rd largest city in the United States. Fitchburg is currently growing at a rate of 0.29% annually and its population has increased by 1.99% since the most recent census, which recorded a population of 40,318 in 2010. Fitchburg reached it's highest population of 43,343 in 1970. Spanning over 28 miles, Fitchburg has a population density of 1,478 people per square mile.
The average household income in Fitchburg is $69,203 with a poverty rate of 16.37%. The median rental costs in recent years comes to $995 per month, and the median house value is $190,900. The median age in Fitchburg is 35.7 years, 35.2 years for males, and 37 years for females. For every 100 females there are 98.1 males.