Arnold is a city located in Maryland. Arnold has a 2020 population of 23,518. Arnold is currently declining at a rate of 0.00% annually and its population has increased by 1.78% since the most recent census, which recorded a population of 23,106 in 2010. Arnold reached it's highest population of 23,518 in 2018.
The average household income in Arnold is $148,375 with a poverty rate of 4.00%. The median rental costs in recent years comes to $1,852 per month, and the median house value is $444,700. The median age in Arnold is 40.7 years, 38.9 years for males, and 41.8 years for females. For every 100 females there are 95.3 males.