21770 vs 21771 ZIP Codes
Monrovia, MD · Mount Airy, MD
| Metric | 21770 | 21771 |
|---|---|---|
| City | Monrovia | Mount Airy |
| County | Frederick | Frederick |
| State | Maryland | Maryland |
| Time zone | Eastern Time | Eastern Time |
| Population | 5,164 | 29,563 |
Demographic figures come from U.S. Census Bureau / ACS data included in the source ZIP dataset; many ZIP codes have no demographic figures in that dataset.