Gardner is a city located in Massachusetts. With a 2020 population of 20,935, it is the 46th largest city in Massachusetts and the 1783rd largest city in the United States. Gardner is currently growing at a rate of 0.52% annually and its population has increased by 3.50% since the most recent census, which recorded a population of 20,228 in 2010. Spanning over 23 miles, Gardner has a population density of 949 people per square mile.
The average household income in Gardner is $66,620 with a poverty rate of 14.95%. The median rental costs in recent years comes to $811 per month, and the median house value is $181,500. The median age in Gardner is 40.9 years, 40.6 years for males, and 41.6 years for females. For every 100 females there are 104.2 males.