| Zip Code : | 21043 |
| City : | Catonsville, Columbia, Ellicott City, Ilchester |
| County : | Howard County, Baltimore County |
| State : | Maryland (MD) |
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| Land Area : | 17.00 sq mi |
| Water Area : | 0.07 sq mi |
| Latitude : | 39.2605804 |
| Longitude : | -76.8001065 |
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| Population (2010): | 42,246 |
| Population Estimate (2012) : | 41,498 |
| Population Density : | 2,485.75/sq mi |
| Housing Units (2012) : | 16,308 |
| Median Household Income (2012) : | $107,560 (Maryland : $72,999, USA : $53,046) |
| Median Family Income (2012) : | $129,993 (Maryland : $88,092, USA : $64,585) |
| Median House Price (2012) : | $468,000 (Maryland : $304,900, USA : $181,400) |