Illinois Low Cost Spay/Neuter Locations:

State-wide:
Spay Illinois

Adams County:
Quincy Humane Society - Quincy, IL

Bond County:
Bond County Humane Society - Greenville, IL 

Cook County:
Paws Chicago - Chicago, IL
Tree House Humane Society - Chicago, IL
Anti Cruelty Society - Chicago, IL
Animal Welfare League Chicago - Ridge, IL
South Suburban Humane Society - Glenwood, IL

Crawford County:
Crawford County Spay and Neuter Foundation - Robinson, IL

Dekalb County:
Tails Humane Society - Dekalb, IL

Jackson County:
Humane Society Of Southern Illinois - Carbondale, IL

Lake County:
Lake County Animal Care & Control - Mundelein, IL

Madison County:
Metro East Humane Society - Edwardsville , IL 

Peoria County:
Operation S.A.F.E. - Dunlap, IL
Peoria County Protection Services - Peoria, IL

Sangamon County:
Animal Protective League S/N Clinic - Springfield, IL

Wayne County:
ARF (Animals Requesting Friends) Benevolent Society - Fairfield, IL

Will County:
National Animal Welfare Society Low Cost Animal Clinic - Mokena, IL

Winnebago County:
Paws Humane Society - Rockford, IL
Animal Services - Rockford, IL