Petersham is a city located in Massachusetts. Petersham has a 2020 population of 249. Petersham is currently declining at a rate of 0.00% annually and its population has increased by 2.47% since the most recent census, which recorded a population of 243 in 2010. Petersham reached it's highest population of 311 in 2011.
The average household income in Petersham is $92,054 with a poverty rate of 6.10%. The median rental costs in recent years comes to $1,214 per month, and the median house value is $309,100. The median age in Petersham is 51.6 years, 47.8 years for males, and 54.5 years for females. For every 100 females there are 80.4 males.