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We figured out the best biggest companies to work for in Illinois using data on salaries, company financial health, and employee diversity. You can also search for the best biggest companies to work for in any other state or city.

Zippia score 4.7
Remove burdensome guesswork from the traditional healthcare process, improve health outcomes for your workplace, prevent unnecessary claims, lower your costs, and get your employees back to productive work sooner with Medcor's health navigation.
Zippia score 4.4
Brake Parts Inc is a premier manufacturer and supplier of brake parts and a global leader in the aftermarket automotive industry. See what BPI has to offer.
Zippia score 4.1
Pioneer Center is a private, non-profit charitable organization, providing programs for people with developmental disabilities, behavioral health services and
Zippia score 3.8
Gary Lang Auto is a new & used McHenry, IL car dealership that sells and services Buick, Cadillac, Chevy, GMC, Kia, Mitsubishi, and Subaru vehicles.
Zippia score 3.9
Medela provides moms and professionals with breast pumps, products, support, and information to help you reach your breastfeeding goals.
Zippia score 3.4
WE ARE INNOVATORS. At Jessup, invention is a mindset. It's how good becomes great; how great becomes the greatest. It's a level of ideation that drives the imagination that leads to the innovation that becomes the invention that disrupts a market and rocks the world.
Zippia score 3.8
Pro QC International provides inspections, factory audits and quality control services in over 88 countries including China, USA, Mexico, India and many more.
Zippia score 4.1
To grow and expand market share.
Zippia score 3.9
To provide essential coaching and guidance for our family, friends, colleagues, and clients to accomplish the things in life that are truly important to them.
Zippia score 3.9
Since 1967 Plaspros has been a leader in the plastics industry with high quality custom injection molding at an affordable price
Zippia score 3.7
We provide an environment where children on the autism spectrum can develop their potential academically, emotionally, socially, communicatively, and physically.
Zippia score 3.7
Home of the Sparrow is a 501 (c) 3 non-profit organization that provides a short-term transitional shelter and supportive services to homeless women and children in McHenry County and Northern Illinois.
Zippia score 4.1
Zippia score 3.9
New home builders of custom homes, panelized homes and general contracting. Fast and easy panelized home construction. From planning and design thru completion.
Zippia score 4.2
Partnering with the Community to Achieve Excellence
Zippia score 4.2
THE ORGANIZATION AWARDS GRANTS THAT ARE CONSISTENT WITH THE CHARITABLE, SCIENTIFIC AND EDUCATIONAL PURPOSES OF THE MARY LANNING MEMORIAL HOSPITAL ASSOCIATION INCLUDING GRANTS FOR THE BENEFIT OF THE ELDERLY.
Zippia score 4.4
Mercy Health was founded in 1986 by the Sisters of Mercy. In 1989, two regional communities of the Sisters of Mercy agreed to co-sponsor our health system as an innovative way to preserve and enhance both of their health ministries. In 1995, they welcomed the Grey Nuns as sponsors, and in 1996, the Grey Nuns transferred sponsorship of their health ministry to Covenant Health Systems. Also in 1996, Mercy Health welcomed the Sisters of the Humility of Mary as sponsors. The Franciscan Sisters of the Poor joined as sponsors in 1999.
Zippia score 4.3
Hanson Professional Services Inc. (Hanson) is a national consulting firm providing engineering, planning and allied services. Call Hanson at 1-800-788-2450.
Zippia score 4.3
Northwestern Medicine formerly Northwestern Memorial Healthcare, is a non-profit healthcare system affiliated with the Northwestern University Feinberg School of Medicine, in Chicago, Illinois.
Zippia score 4.1
Follett Corporation is a Westchester, Illinois-based company that provides a variety of educational products to schools, colleges, and public libraries through its subsidiaries.
Zippia score 4.0
Aspen Dental Management, Inc. is a dental support organization - a dental practice management corporation that provides business support and administrative services in the US. Its headquarters is in DeWitt, New York.
Zippia score 4.6
Avient is here to help you meet and beat your challenges with complex material science, so your next breakthrough can rock the market.
Zippia score 4.2
For over 45 years, The Alden Network has provided health care and residential solutions for seniors to help them function to the best of their ability and live life as independently as possible.
Zippia score 3.6
TCC is one of the largest T-Mobile exclusive retailers operating over 125 stores in 10 states and rapidly growing
Zippia score 4.5
Pace Analytical is a sampling and analytical testing firm. Pace Analytical has provided comprehensive analytical testing and emergency disaster response services to a broad range of clients, markets and industries. Today, Pace Analytical is recognized as the industry's second largest environmental testing firm in the United States, operating a nationwide network of twenty-one laboratories, four specialty services laboratories and twenty-one service centers.
Zippia score 3.9
Comprehensive orthopedic care for adults and children. More than 100 doctors and 20 locations in Illinois. Immediate care, physical therapy, MRI, workers' compensation and more.
Zippia score 4.1
Rosecrance is a longstanding provider of addiction treatment centers and drug abuse recovery. (866) 330-8729. Comprehensive, Licensed Behavioral Health Treatment and Addiction Treatment Centers for Teens, Young Adults, and Adults in Illinois, Iowa and ...
Zippia score 4.3
PetroChoice is a leading value-added provider of petroleum based lubrication products and services, providing its customers with complete Lubrication Solutions to meet their Safety, Savings, and Sustainability goals. PetroChoice distributes an extensive product offering of lubricants, coolants, metalworking fluids, equipment, auto-lube and filtration systems, and contamination control devices backed by unmatched technical expertise and services.
Zippia score 4.3
All your favorite places are ACE Places - Restaurants, Pubs, Nightclubs, Party Venues, Boat Cruises and MORE
Zippia score 4.3
All of our Caregivers are compassionate and experienced home care service professionals. Our pre-employment screening process includes drug testing, reference checks, and a thorough criminal background check. Contact us for healthcare services.
Zippia score 4.0
FirstLight Home Care is a leading home care company, providing compassionate in-home care, senior care and respite care to any adult in need. Whether it is illness, injury, dementia, or just challenges that come with old age,. FirstLight Home Care creates a new standard in non-medical home care which is customized for seniors, people with disabilities, those recuperating, veterans, and anyone who needs extra help. The demand for quality home care is at an all-time high, with more than 12 percent of Americans over 65 years old wanting to remain independent for as long as possible. The combination of its dynamic senior leadership team with over 80 years of collective senior care experience with innovative approaches make FirstLight an emerging market leader in a fast growing industry. FirstLight Home Care franchises have exclusive access to a best-in-class franchise support system bringing together an array of franchise essentials, unmatched in the industry.
Zippia score 4.2
Eppendorf North America, Inc. offers centrifuges, pipettes, and thermal cyclers. The company provides cell manipulation, microarrays, photometry, dispensers, temperature control and mixing, and vacuum concentration products, as well as tips, tubes, and plates, which are used in life science research and clinical testing settings, laboratory, and cell and molecular biology applications. It also offers product installation and training, maintenance, and calibration and repair services. The company was incorporated in 1989 and is based in Westbury, New York with service locations in Pennsauken, New Jersey; San Diego, California; and Mississauga, Canada. Eppendorf North America, Inc. operates as a subsidiary of Eppendorf AG.
Zippia score 3.9
Founded in 1984, First Midwest Group is a full-service Real Estate Development and Property Management Company in the Midwest with in-house acquisition, investment, development, leasing, and property management capabilities. First Midwest Group is also a company which owns and operates other outside businesses, as well as makes financial investments in up and coming companies both domestically and internationally.
Zippia score 3.8
Rosin Eyecare is your eye doctor in Chicago with the history, experience, and exceptional eye care that provides the best vision results and patient care.
Zippia score 3.5
AID offers over 20 different programs for individuals with developmental or physical disabilities and those in need of behavioral health services or crisis intervention.
Zippia score 3.9
Blackhawk Bancorp, Inc. is the bank holding company for Blackhawk Bank. Blackhawk Bank operates eight banking centers in south central Wisconsin and north central Illinois, along the I-90 corridor from Beloit, Wisconsin to Belvidere, Illinois.
| Rank | Company | Zippia score |
|---|---|---|
| 1 | Medcor | |
| 2 | Brake Parts | |
| 3 | Pioneer Center for Human Services | |
| 4 | Gary Lang Auto Group | |
| 5 | Medela | |
| 6 | Jessup Manufacturing Company | |
| 7 | Pro QC International | |
| 8 | Imagetec Lp | |
| 9 | McHenry Savings Bank | |
| 10 | Plaspros | |
| 11 | Alexander Leigh Center for Autism | |
| 12 | Home of the Sparrow | |
| 13 | Affinia Under Vehicle Group | |
| 14 | Midwest Homes | |
| 15 | McHenry East High School | |
| 16 | Sunnyside |