Waltham is a city located in Massachusetts. With a 2020 population of 62,954, it is the 16th largest city in Massachusetts and the 603rd largest city in the United States. Waltham is currently declining at a rate of -0.01% annually but its population has increased by 3.83% since the most recent census, which recorded a population of 60,632 in 2010. Waltham reached it's highest population of 63,097 in 2014. Spanning over 14 miles, Waltham has a population density of 4,940 people per square mile.
The average household income in Waltham is $104,768 with a poverty rate of 10.92%. The median rental costs in recent years comes to $1,584 per month, and the median house value is $497,100. The median age in Waltham is 33.9 years, 33.6 years for males, and 34.2 years for females. For every 100 females there are 97.1 males.