Chicago Zoological Society (Brookfield, IL)


  • Name:Molly Heise
  • Title:Assistant Director of Foundation and Government Relations

Organization Address

  • Organization Name:Chicago Zoological Society
  • Address:3300 Golf Rd
    Brookfield, IL 60513
    United States

Organization Phone

  • Main phone:708-688-8384

Organization Web

User Email


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  • Mission:
  • Our Vision
    The Chicago Zoological Society is a recognized leader in influencing people’s
    actions to conserve wildlife and value nature.
    Our Mission
    To inspire conservation leadership by connecting people with wildlife and nature.

  • History:
  • The Chicago Zoological Society (CZS) was founded in 1921 and opened Brookfield Zoo to the public in 1934. Located 12 miles from downtown Chicago, we are widely recognized as one of the top five zoos in the United States. More than 216 professionally landscaped acres are home to a world-class collection of more than 2,200 animals, representing 450 species of birds, mammals, reptiles, amphibians, fish and invertebrates.

    In the last 15 years, the zoo has broken the two million annual attendance mark nine times; in 2010 we set an all-time attendance record with visitors and reached record membership levels peaking at more than. In 2010, attendance was 2,283,065 (our highest attendance in our 75 year history) with the following demographic breakdown: 2% Asian; 10% African-American; 11% Latino; 74% White; and, 3% other. Membership peaked at 110,000 households (representing more than 500,000 individuals) and remains the highest membership base for cultural institutions in the Chicago area. Approximately 220,000 students and 1,400 teachers from the Chicago Public School District and surrounding school districts attend each year. CZS community outreach programs touch nearly 1.25 million individuals through free community passes, and events such as career fairs, children’s festivals and neighborhood special events. The CZS website, a valued community resource, has more than 2.5 million visits annually. Last year, our community outreach programs served: 38% Hispanic; 38% White; 14% African American; 5% Middle Eastern; 2% Asian; and, 3% other.

    As a leading conservation center, CZS works to help save endangered species, call attention to the plight of threatened ecosystems, resolve critical conservation issues, and create new ways to understand and manage restricted populations in the wild and in zoos. Today, research and best practices conducted by CZS at Brookfield Zoo are helping to redefine how captive animals are treated around the world. CZS employs leading scientists in behavioral endocrinology; behavioral research, enrichment, and training; veterinary science, conservation medicine, and zoo pathology; nutrition science and small population biology.

    In 2006, CZS began combining these areas of expertise to create the Center for the Science of Animal Welfare, which emphasizes cross-discipline communication and incorporation of scientific results into animal care and management protocols and decisions as well as facilities design and management. Our goal is to create a comprehensive approach to improvements in animal husbandry for zoos and aquariums throughout the nation as well as disseminate this knowledge throughout the wildlife professional community.

    Beginning in 2010, the Center for the Science of Animal Welfare assumed national and international leadership in the science of animal welfare, the application of that science, and the education and fostering of future scientists. As the first step in this direction Dr. Nadja Wielebnowski, Vice President of Conservation Science and Head of Behavioral Endocrinology for CZS, has been appointed chair of the Animal Welfare Committee of the Association of Zoos and Aquariums (AZA).

    CZS also considers community outreach and education programs to be crucial to fulfilling our conservation mission. The Center for Conservation Leadership was developed as part of our strategic plan to promote conservation leadership at all levels of society and to help people value conservation in the context of an increasingly urbanized and culturally diverse population. CZS has developed three objectives for the Center for Conservation Leadership: •To increase interest in science, especially among youth •To enhance school curriculum through student programs and advanced teacher training •To ensure that CZS programs serve all segments of the community through a comprehensive community outreach and diversity initiative

  • Year established:1921
  • Endowment:Unknown


  • Executive / Trustee board size:45
  • Advisory board size:11
  • Staff size:420


  • Organization type:Grantseeker
  • Country of registration:United States
  • Tax Determination Letter:Received Determination Letter
  • IRS Section:501(c)(3)
  • IRS Subsection:None
  • Tax ID:36-2167016

Other Organization Web

IRS Business Master File Information

  • EIN:362167016
  • Sort (Secondary) Name:THE NORTHERN TRUST COMPANY
  • Care Of Name:% H BARNUM
  • Organization Address:3300 GOLF RD
  • Organization City:BROOKFIELD
  • Organization State:IL
  • Organization Zip:60513-1060
  • Group Exemption Number:0000
  • Subsection Code:03
  • Classification Code(s):1, 2
  • Subsection/Classification Desc.:Charitable Organization, Educational Organization
  • Affiliation Code:3
  • Ruling Date:September, 1941
  • Deductibility Code:1
  • Foundation Code:15
  • Foundation Code Desc.:Organization which receives a substantial part of its support from a governmental unit or the general public 170(b)(1)(A)(vi)
  • Activity Code(s):350, 059
  • Activity Code Desc.(s):Preservation of natural resources (conservation), Other school related activities
  • Organization Code:1 (Corporation)
  • Exempt Org. Status Code:01 (Unconditional Exemption)
  • Tax Period:December, 2016
  • Filing Requirement Category:01 (990 (all other) or 990EZ return)
  • Accounting Period:December
  • NTEE Code:D500
  • Asset Amount:$213,879,000
  • Asset Code:9 ($50,000,000+)
  • Income Amount:$91,924,622
  • Income Code:9 ($50,000,000+)
  • 990 Revenue Amount:$62,585,174
  • Last Updated:2/25/2018 9:57:10 am

This information is directly from the IRS Exempt Organization Business Master File at Exempt Organizations Business Master File Extract. This information is not under the control of the Common Grant Application and is collected and compiled and can only be changed by the IRS.