Waltham is a city located in Minnesota. With a 2020 population of 152, it is the 704th largest city in Minnesota and the 17428th largest city in the United States. Waltham is currently growing at a rate of 0.66% annually and its population has increased by 0.66% since the most recent census, which recorded a population of 151 in 2010. Waltham reached it's highest population of 152 in 2011. Spanning over 0 miles, Waltham has a population density of 318 people per square mile.
The average household income in Waltham is $92,226 with a poverty rate of 13.64%. The median rental costs in recent years comes to - per month, and the median house value is $79,300. The median age in Waltham is 36.3 years, 34.4 years for males, and 38.1 years for females. For every 100 females there are 109.5 males.