For the convenience of students, the college may offer classes at the following locations. For a list of the extension sites used for a specific semester, consult the class schedule for that semester.
- Abbott Laboratories (ABOT)
1401 Sheridan Road, North Chicago
- Adlai Stevenson High School (ADST)
1 Stevenson Drive, Lincolnshire
- Adult Learning and Technology Center (ALTC)
2416 Washington Street, Waukegan
- Antioch Community High School (ACHS)
1133 Main Street, Antioch
- Ballybunion Golf Learning Center (BGLC)
Route 83 & Aptakisic Road, Long Grove
- Charlie's Professional Bartending School (CPBS)
27764 Volo Village Road, Volo
- Condell Medical Center (COND)
801 South Milwaukee, Libertyville
- Daisy's Resource Development (DRDC)
1920 Sherman Avenue, North Chicago
- Deerpath Golf Course (DPGC)
500 West Deerpath Road, Lake Forest
- Department of Human Services (DHS)
3235 W. Belvidere Street, Park City
- Gavin Community Center West (GCCW)
37850 North IL. Route 59 Lake Villa
- Grayslake Fire Department (GLFD)
160 Hawley, Grayslake
- Grayslake Central High School (GLHS)
400 North Lake Street, Grayslake
- Great Lakes Center (GTLK)
Building 617, Great Lakes
- Highland Park Hospital (HPHP)
718 Glenview Avenue, Highland Park
- Holy Family Parish (HFPW)
510 Tenth Street, Waukegan
- Job Center of Lake County (JOBC)
1 N. Genesee Street, Waukegan
- Lake Barrington Municipal Center (LBAR)
23860 Old Barrington Road, Lake Barrington
- Lake County High Schools Technology Campus (HST)
19525 West Washington Street, Grayslake
- Lake County Jail (LCJ)
20 S. County Street, Waukegan
- Lake Forest Senior Center (LFSC)
100 E Old Mill Road, Lake Forest
- Lincolnshire Mariott (MARI)
10 Mariott Drive, Lincolnshire
- North Branch Courthouse (NBCR)
1792 Nicole Avenue, Round Lake
- North Chicago High School (NCHS)
1717 17th Street, North Chicago
- Ohana Martial Arts (OMA1)
995 Progress Drive, Grayslake
- Patty Turner Senior Center (PTSC)
375 Elm Street, Deerfield
- Peter Patterson Glassworks (PPGW)
888 Tower Road Suite E, Mundelein
- Pope’s Florist LTD (PFL)
2229 Grand Avenue, Waukegan
- Round Lake Area Library (RLAL)
906 W. Hart Road, Round Lake
- Round Lake High School (RLHS)
One Panther Boulevard, Round Lake
- Sewing Source (SSDT)
122 East Grand Avenue, Lake Villa
- St. Therese Medical Center (STHP)
2615 Washington Street, Waukegan
- University Center Grayslake (UCG)
1200 University Center Drive, Grayslake
- University Center - Waukegan (UCW)
1 N. Genessee Street, Waukegan
- University of Illinois Extension, Lake County (UILC)
100 South U.S. Highway 45m Grayslake
- V.A. Medical Center (VAMC)
3001 Green Bay Road, North Chicago
- Wauconda High School (WAUC)
555 N. Main, Wauconda
- Wauconda Park District (WPD)
600 N. Main Street, Wauconda
- Waukegan High School (WHSW)
2325 Brookside Avenue, Waukegan
- Waukegan Township Park Place (WTPP)
414 S. Lewis Avenue, Waukegan
- Waukegan Welcome Center (WWC)
742 Greenwood, Waukegan
- Wool, Wrap & Wheel (SPIN)
5605 Mill Street, Richmond
- Workforce Develop Center of Zion a Project of Sustainability Initiative (ZBPC)
1608 23rd Street, Zion
- Zion Benton Public Library (ZBPL)
2400 Gabriel Avenue, Zion