| City : | Ottawa City |
| County : | Lasalle County |
| State : | Illinois (IL) |
| Land Area : | 12.00 sq mi |
| Water Area : | 0.80 sq mi |
| Latitude : | 41.3533787 |
| Longitude : | -88.8318501 |
| Population (2010): | 18,768 |
| Population Estimate (2012) : | 19,258 |
| Population Density : | 1,563.82/sq mi |
| Housing Units (2012) : | 8,569 |
| Median Household Income (2012) : | $47,480 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $62,395 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $132,900 (Illinois : $190,800, USA : $181,400) |