| GeoNames Home | Postal Codes | Download / Webservice | About |
| Name | Population | Latitude/Longitude | |
|---|---|---|---|
| 1 | Baltimore | 610,892 | 39.29 / -76.612 |
| 2 | Columbia | 96,201 | 39.24 / -76.839 |
| 3 | Silver Spring | 77,951 | 38.991 / -77.026 |
| 4 | Ellicott City | 66,215 | 39.267 / -76.798 |
| 5 | Germantown | 64,720 | 39.173 / -77.272 |
| 6 | Dundalk | 61,659 | 39.251 / -76.521 |
| 7 | Rockville | 60,646 | 39.084 / -77.153 |
| 8 | Gaithersburg | 60,062 | 39.143 / -77.201 |
| 9 | Frederick | 57,297 | 39.414 / -77.411 |
| 10 | Towson | 53,749 | 39.401 / -76.602 |
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