 | curran contracting company | crystal lake, illinois, united states | 107 | construction | 1937 | |
 | 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 | |
 | 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 | |
 | reina imaging | crystal lake, illinois, united states | 12 | medical equipment manufacturing | 1978 | |
 | Complete Payroll, Inc. | Crystal Lake, illinois, united states | - | accounting | 2008 | |
 | In Sync Systems, Inc. | Crystal Lake, illinois, united states | 1 | telecommunications | 1991 | |
 | Dekan Athletic Equipment Corporation | Crystal Lake, illinois, united states | 6 | sporting goods | - | |
 | DIRECT DESIGN LTD | Crystal Lake, illinois, united states | 11 | - | - | |
| Crystal Lake Community | Crystal Lake, illinois, united states | 3 | primary and secondary education | - | |
 | Counterpoint Advisors | Crystal Lake, illinois, united states | 3 | management consulting | 2014 | |
| BMI Weight Busters Inc | Crystal Lake, illinois, united states | - | - | - | |
| diamond bath, llc. | crystal lake, illinois, united states | - | construction | 2013 | |
| cl graphics | crystal lake, illinois, united states | - | marketing and advertising | 1981 | |
| scholl construction company | crystal lake, illinois, united states | - | construction | 2002 | |
 | miller verchota, inc. | crystal lake, illinois, united states | - | accounting | 2000 | |
| oil painters of america | crystal lake, illinois, united states | - | fine art | 1991 | |
 | ADAM'S WATER TREATMENT, INC. | Crystal Lake, illinois, united states | - | - | - | |
