City in Missouri
Arnold, MO
- Population
- 21,036 (2024)
- Density
- 1,830 / sq mi
- Land area
- 11.5 sq mi
- Water area
- 0.0 sq mi
- Coordinates
- 38.4260, -90.3693
Resident reviews
Be the first to review →No reviews yet. Live in Arnold, or used to? Tell people what it is really like.
ZIP codes
- 63010