
Arnold
- County:
- Anne Arundel County
- County Seat:
- No
- Area (mi²):
- 10.819
- State:
- Maryland
Arnold is a CDP located in Anne Arundel County, Maryland. Arnold has a 2025 population of 25,255. Arnold is currently growing at a rate of 0.57% annually and its population has increased by 3.78% since the most recent census, which recorded a population of 24,334 in 2020.
The average household income in Arnold is $170,720 with a poverty rate of 3.01%. The median age in Arnold is 38.2 years: 38.3 years for males, and 38 years for females.