 | curran contracting company | crystal lake, illinois, united states | 107 | construction | 1937 | |
 | General Kinematics Vibrating Equipment | crystal lake, illinois, united states | 212 | machinery manufacturing | 1960 | |
 | Family Health Partnership Clinic | Crystal Lake, illinois, united states | 26 | health, wellness and fitness | 1996 | |
 | Delta-Therm Corporation | Crystal Lake, illinois, united states | 11 | building materials | 1968 | |
 | The Hode Group, Inc. | Crystal Lake, illinois, united states | 18 | food and beverages | 1996 | |
 | 20/20 Imaging | Crystal Lake, illinois, united states | 13 | medical device | - | |
 | Crystal Lake Oral Surgery Inc | Crystal Lake, illinois, united states | 6 | mechanical or industrial engineering | - | |
 | Crystal Lake Rib House | Crystal Lake, illinois, united states | 8 | restaurants | 1989 | |
 | Kal's Cars Inc | Crystal Lake, illinois, united states | 1 | automotive | 2011 | |
 | Complete Payroll, Inc. | Crystal Lake, illinois, united states | - | accounting | 2008 | |
 | reina imaging | crystal lake, illinois, united states | 12 | medical equipment manufacturing | 1978 | |
 | In Sync Systems, Inc. | Crystal Lake, illinois, united states | 1 | telecommunications | 1991 | |
 | Heartland Cabinet Supply, Inc. | Crystal Lake, illinois, united states | 9 | building materials | 1999 | |
| Prairie Ridge High School | Crystal Lake, illinois, united states | 44 | - | - | |
 | Skyridge Club Apartments | Crystal Lake, illinois, united states | - | health, wellness and fitness | - | |
 | White Oak Interiors | Crystal Lake, illinois, united states | 3 | design | 1990 | |
 | Sun Centre USA Inc. | crystal lake, illinois, united states | 9 | machinery manufacturing | 2015 | |
| Crystal Lake Pediatric Dental | Crystal Lake, illinois, united states | 4 | hospital and health care | - | |
 | INAV LLC | Crystal Lake, illinois, united states | 21 | airlines and aviation | 2004 | |
 | Hydrovent LLC | Crystal Lake, illinois, united states | 1 | public safety | 1985 | |
