| City : | Cortland Town |
| County : | Dekalb County |
| State : | Illinois (IL) |
| Land Area : | 3.63 sq mi |
| Water Area : | 0.01 sq mi |
| Latitude : | 41.9376998 |
| Longitude : | -88.6913961 |
| Population (2010): | 4,270 |
| Population Estimate (2012) : | 4,280 |
| Population Density : | 1,176.38/sq mi |
| Housing Units (2012) : | 1,530 |
| Median Household Income (2012) : | $70,764 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $69,063 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $164,400 (Illinois : $190,800, USA : $181,400) |