Chicago Zoological Society
To inspire conservation leadership by connecting people with wildlife and nature.
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Visit www.brookfieldzoo.orgAbout Chicago Zoological Society
Chicago Zoological Society is a animal welfare organization based in BROOKFIELD, United States. Annual revenue: $82.2 million. 0% of spending goes directly to programs. EIN: 362167016.
Verified certifications
Confirmed against the issuing authority - not self-reported.
Mission
To inspire conservation leadership by connecting people with wildlife and nature.
Focus areas & reach
· What they work on and whereHow it stacks up against peers
· vs. 8 similar animal welfare in United StatesRed flags
· All clearWhere every $1 goes
Common questions
· Auto-generated from filings + methodologyChicago Zoological Society is a registered animal welfare nonprofit based in Brookfield, IL, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1921 and has been operating for 105 years. Its EIN is 362167016. It has a GiveRadar Integrity Assessment of 87/100 (Strong transparency), indicating well-documented governance, financials, and contact details. The organization reports $108M in annual revenue. 239 officers and directors are publicly disclosed. No red flags have been detected.
Chicago Zoological Society has a GiveRadar Integrity Assessment of 87/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 87 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. For comparison, the average integrity assessment for animal welfare charities in United States is 92/100.
Chicago Zoological Society is located in Brookfield, IL, United States. The organization was established in 1921 and has been active for 105 years.
Based on official tax filings, Chicago Zoological Society has $108M in annual revenue. It allocates 0% of expenses to programs and services. This is below the average of 96% for animal welfare charities in United States. Its revenue is significantly above the peer average of $1M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.
Chicago Zoological Society is classified as a Animal Welfare organization, registered in United States. It operates as a Publicly-supported charity (509(a)(2)). By size, it is categorized as a major organization. It has $108M in annual revenue. The organization has 239 disclosed officers and directors.
No red flags have been detected for Chicago Zoological Society. GiveRadar automatically screens charities for concerning patterns including high executive compensation, low program spending, and missing financial filings. Based on available official data, no issues have been identified.
Chicago Zoological Society has a GiveRadar Integrity Assessment of 87/100 (Strong transparency) and no red flags have been detected, which suggests it is a well-documented organization. It is regulated by the IRS. 0% of expenses go to programs. The peer average is 96%. Visit the Chicago Zoological Society profile on GiveRadar for full details before deciding. GiveRadar provides data for research purposes and does not endorse any organization. Always do your own due diligence.
Chicago Zoological Society is a animal welfare organization based in BROOKFIELD, United States. Annual revenue: $82.2 million. 0% of spending goes directly to programs. EIN: 362167016. Chicago Zoological Society is classified as a animal welfare organization registered in United States. The organization was founded in 1921.
Among animal welfare charities registered in United States: Chicago Zoological Society's GiveRadar Integrity Assessment of 87/100 is in line with the peer average of 92/100. It allocates 0% of expenses to programs, below the peer average of 96%. Its annual revenue of $108M is well above the peer average of $1M.
Yes, donations to Chicago Zoological Society are generally tax-deductible in the United States. Its EIN is 362167016, which you can use for tax filing purposes. Donors can typically deduct contributions on their federal income tax return if they itemize deductions. Consult a tax professional for guidance specific to your situation.
Verified against 7 official sources, last refreshed .
Filing history
10 years on file from IRS 990 (FY2025): revenue, expenses, program spending, assets, and liabilities by fiscal year.
See 5 years of revenue, expense breakdowns, and balance sheet.
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Tax-deductibility for donors
Donations may be tax-deductible for residents of United States under local rules. Confirm with the charity directly.
CHICAGO ZOOLOGICAL SOCIETY is registered in United States. Donations from the Netherlands to charities outside the EU/EEA are generally not tax-deductible for Dutch donors unless the charity is listed on the Dutch ANBI register with foreign-recognized status.
Always confirm tax treatment with the charity directly or your tax advisor before donating.
Leadership
Officers & trustees (25)
Source: Public filings
Latest news
From global news sources
10 articles found
From global news sources
Sentiment
NeutralStrike ends after 3 days as Brookfield Zoo, union officials reach tentative agreement on 4-year contract - Chicago Sun-Times
Brookfield Zoo on Brink of Strike Amid Bitter Pay Dispute - BriefGlance
Hundreds of Brookfield Zoo Chicago staff authorize strike after rejecting latest contract offer - CBS News
Teamsters at the Brookfield Zoo Chicago Authorize a Strike - International Brotherhood of Teamsters
Chicago Zoological Society’s Brookfield Zoo unveils new brand: Brookfield Zoo Chicago - The Chicago Crusader
Chicago Zoological Society receives historic $40M donation for Brookfield Zoo - FOX 32 Chicago
Andrea Rodgers joins Chicago Zoological Society as Senior Vice President of Guest Experience and Operations - Association of Zoos and Aquariums (AZA)
Chicago Zoological Society Ayuda a aumentar la diversidad genética de los lobos mexicanos salvajes - Association of Zoos and Aquariums (AZA)
Chicago Zoological Society Helps to Increase Genetic Diversity of Wild Mexican Wolves - Association of Zoos and Aquariums (AZA)
NIU president elected trustee of Chicago Zoological Society - Riverside-Brookfield Landmark
Activity timeline
Filings and press mentions, merged
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Other animal welfare in United States, by integrity assessment
Sources and verification
Refreshed
- Registration and legal identity
- Internal Revenue Service (IRS) - Tax Exempt Organization Search
- Financial filings
- IRS Form 990 filings - Fiscal year 2025 most recent on file.
- Officers and trustees
- Internal Revenue Service (IRS) - Tax Exempt Organization Search - 239 disclosed in the public registry.
- News and media coverage
- GDELT Project + Google News
- Supplementary verification
- ProPublica Nonprofit Explorer
- Supplementary verification
- Wikidata structured data
- Supplementary verification
- Charity Navigator
Data freshness
What we don't know
Honest gaps - our score reflects transparency, not impact
Methodology
GiveRadar combines public registry filings, ProPublica Nonprofit Explorer, Charity Navigator, GuideStar, and news archives into a single 0-100 integrity assessment. We don't take a cut of any donation, ever.
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Quick facts about Chicago Zoological Society
- What is Chicago Zoological Society?
- Chicago Zoological Society is a animal welfare publicly-supported charity (509(a)(2)) based in Brookfield, United States. Chicago Zoological Society is a animal welfare organization based in BROOKFIELD, United States. Annual revenue: $82.2 million. 0% of spending goes directly to programs. EIN: 362167016.
- When was Chicago Zoological Society founded?
- Chicago Zoological Society was founded in 1921.
- Who leads Chicago Zoological Society?
- Michael J Adkesson serves as President and CEO.
- Where is Chicago Zoological Society located?
- Headquartered in Brookfield, United States.
- What is Chicago Zoological Society's annual budget?
- Annual revenue for fiscal year 2025 is approximately $100M-$1B. 0% of expenses go to program services.
- Is Chicago Zoological Society trustworthy?
- Chicago Zoological Society has a GiveRadar Integrity Assessment of 87 out of 100 (Strong transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
- What is Chicago Zoological Society's registration number?
- IRS EIN: 362167016.
- What is Chicago Zoological Society's website?
- http://www.brookfieldzoo.org