| City : | Olney |
| County : | Brookings County, Fond du Lac County, Madison County, Montgomery County, Washington County |
| State : | Maryland (MD) |
| | |
| Land Area : | 16.19 sq mi |
| Water Area : | 0.05 sq mi |
| Latitude : | 39.1443317 |
| Longitude : | -77.0714058 |
| | |
| Population (2010): | 33,844 |
| Population Estimate (2012) : | 33,789 |
| Population Density : | 2,089.98/sq mi |
| Housing Units (2012) : | 11,879 |
| Median Household Income (2012) : | $124,891 (Maryland : $72,999, USA : $53,046) |
| Median Family Income (2012) : | $134,633 (Maryland : $88,092, USA : $64,585) |
| Median House Price (2012) : | $501,300 (Maryland : $304,900, USA : $181,400) |