| Date of Incorporation | December 13, 1969 |
| Jurisdiction | 9.5 square miles |
| Total miles of streets the city maintains | 68 |
| Form of Government | Council/Aldermanic 7 Alderman elected from seven wards Mayor, City Clerk and Treasurer elected at large. Administrator is chief administrative officer. |
| Population 2020 | 22,011 |
| Population 2010 | 22,086 |
| Housing Units | 8,929 |
| Median Family Income | $104,226 |
| Median Age | 45 |
| Average Home Value | $343,100.00 |
| Average Rental | $1,566.00 |
| Sales Tax Rate | 8.00% |
| Food & Beverage Tax | 1.25% |
| Water Utilities | City of Darien Water System |
| Sewer Utility | DuPage County Environmental Concerns |
