About Cohasset, MACohasset is located in Massachusetts. Cohasset, Massachusetts has a population of 8,356. Cohasset is more family-centric than the surrounding county with 37% households with children. The county percentage for households with children is 30%. The median household income in Cohasset, Massachusetts is $101,133. The median household income for the surrounding county is $78,047 compared to the national median of $49,877. The median age of people living in Cohasset is 46.5 years. Cohasset WeatherThe average high temperature in July is 81.4 degrees, with an average low temperature in January of 19.8 degrees. The annual precipitation is 50.69. Cohasset MapCohasset real estate officesReal estate near CohassetNearby Cities |