Merrimac is located in Massachusetts. Merrimac, Massachusetts has a population of 7,123. Merrimac is more family-centric than the surrounding county with 30% households with children. The county percentage for households with children is 28%.
The median household income in Merrimac, Massachusetts is $88,828. The median household income for the surrounding county is $82,493 compared to the national median of $66,222. The median age of people living in Merrimac is 48 years.
The average high temperature in July is 83.5 degrees, with an average low temperature in January of 15.6 degrees. The annual precipitation is 46.88.