Charities United States Animal Welfare Zoological Society of Philadelphia
ZO

Zoological Society of Philadelphia

To flourish as an urban oasis, where people and animals thrive, (continued in schedule o)

Animal Welfare Philadelphia, PA EIN 231352298 · IRS Sign up to see website
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84
Integrity Assessment
Strong transparency
84/100 · methodology

About Zoological Society of Philadelphia

Zoological Society of Philadelphia is a animal welfare organization based in PHILADELPHIA, United States. Founded in 1859. Annual revenue: $54.7 million. 0% of spending goes directly to programs. EIN: 231352298.

Founded
Headquarters
Philadelphia, PA
Foundation type
Publicly-supported charity (509(a)(2))
NTEE code
D500
IRS subsection
501(c)(c3)
Ruling date
Size
major

Verified certifications

Confirmed against the issuing authority - not self-reported.

IRS Tax-Deductible since 1942

Mission

To flourish as an urban oasis, where people and animals thrive, (continued in schedule o)

Focus areas & reach

· What they work on and where
Animal Welfare · NTEE D500
Cause tags
SDG alignment The 17 UN Sustainable Development Goals (SDGs) are the global agenda for ending poverty, protecting the planet, and ensuring prosperity by 2030. We tag each charity to the goals its work advances.
SDG 15 SDG 15 · Life on Land Protect, restore, and promote sustainable use of terrestrial ecosystems and biodiversity.

How it stacks up against peers

· vs. 8 similar animal welfare in United States
Program spending This charity: 0%
Peer average: 96%
CEO comp as % of revenue This charity: 1.29%
Peer average: 0.48%
Integrity Assessment This charity: 84
Peer average: 92

Red flags

· All clear
IRS revocation history
Open investigations
Governance scandals
Related-party deals
Excessive exec comp

Where every $1 goes

Program expenses$0.00 ($32.8 million)

Common questions

· Auto-generated from filings + methodology

Zoological Society of Philadelphia is a registered animal welfare nonprofit based in Philadelphia, PA, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1859 and has been operating for 167 years. Its EIN is 231352298. It has a GiveRadar Integrity Assessment of 84/100 (Strong transparency), indicating well-documented governance, financials, and contact details. The organization reports $44M in annual revenue. 219 officers and directors are publicly disclosed. No red flags have been detected.

Zoological Society of Philadelphia has a GiveRadar Integrity Assessment of 84/100. 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 84 ('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.

Zoological Society of Philadelphia is located in Philadelphia, PA, United States. The organization was established in 1859 and has been active for 167 years.

Based on official tax filings, Zoological Society of Philadelphia has $44M 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.

Zoological Society of Philadelphia 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 $44M in annual revenue. The organization has 219 disclosed officers and directors.

No red flags have been detected for Zoological Society of Philadelphia. 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.

Zoological Society of Philadelphia has a GiveRadar Integrity Assessment of 84/100 (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 Zoological Society of Philadelphia 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.

Zoological Society of Philadelphia is a animal welfare organization based in PHILADELPHIA, United States. Founded in 1859. Annual revenue: $54.7 million. 0% of spending goes directly to programs. EIN: 231352298. Zoological Society of Philadelphia is classified as a animal welfare organization registered in United States. The organization was founded in 1859.

Among animal welfare charities registered in United States: Zoological Society of Philadelphia's GiveRadar Integrity Assessment of 84/100 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 $44M is well above the peer average of $1M.

Yes, donations to Zoological Society of Philadelphia are generally tax-deductible in the United States. Its EIN is 231352298, 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 6 official sources, last refreshed .

Annual revenue
$10M-$100M
0% to programs
Source: IRS 990 (FY2025) why this matters
Unlock exact figures

Filing history

10 years on file from IRS 990 (FY2025): revenue, expenses, program spending, assets, and liabilities by fiscal year.

Years on record: FY2025, FY2024, FY2023, FY2022, FY2021, FY2020, FY2019, FY2018, FY2017, FY2016.
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Taxes

Tax-deductibility for donors

Donations may be tax-deductible for residents of United States under local rules. Confirm with the charity directly.

Always confirm tax treatment with the charity directly or your tax advisor before donating.

Leadership

KA
Kathleen Horton
Chief Financial Officer

Officers & trustees (25)

Source: Public filings

AM
Amy S••••••
CHIEF MARKETING OFFICER
AN
Andrew H••••••
Director
AN
Andrew S••••
Director
AN
Anthony G••
Director
BA
Barbara S•••
Director
BR
Brian D• S•••••••
Director
CA
Cara T•••••••
VP, GUEST ENGAGEMENT
CA
Carole H••• G••••••
Director
CA
Caroline B••• R•••••
Director
CA
Carolyn W T•••••
Director
CH
Charles N M•••••••
Director
CH
Christine C••••
CONTROLLER/TREASURER (THRU 02/21)
CH
Christoper L•••••
Director
CO
Courtney M•••••• J••••••
CHIEF ADMINISTRATION OFFICER
CY
Cynthia F•••••••
Director
DA
Dale P•••••••••
Director
DI
Diana R•••••
Director
ED
Ed B••••••
Director
EL
Ellen W•••
VICE CHAIR (THRU 06/21)
F
F W•••••• M••••• I••
CHAIR (THRU 05/22)
GE
George D••
Director
GE
Gerald G••••••
Director & IT
JA
Jay H C•••••• J•
Director
JE
Jeffrey H••••• A• O• 0•••
HEAVY EQUIPMENT OPERATOR
JO
Joanna M L••••
CHAIR
Full names, contact details & compensation

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Latest news

From global news sources

No recent news coverage found

News coverage will appear here when articles mention this organization.

Activity timeline

Filings and press mentions, merged

Form filed
$43.7M revenue
FY2025
IRS_990
Form filed
$43.4M revenue
FY2024
IRS_990
Form filed
$35.5M revenue
FY2023
IRS_990
Form filed
$54.7M revenue
FY2022
IRS_990
Form filed
$26.5M revenue
FY2021
IRS_990
Form filed
$41.0M revenue
FY2020
IRS_990
Form filed
$40.2M revenue
FY2019
PROPUBLICA
Form filed
$38.9M revenue
FY2018
PROPUBLICA
Form filed
$34.7M revenue
FY2017
PROPUBLICA
Form filed
$36.5M revenue
FY2016
PROPUBLICA

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Peer charities

Other animal welfare in United States, by integrity assessment

Charity Score Revenue Program %
Zoological Society of Philadelphia This page 84 $43.7 million 0%
Critter Encounters 93 $230,370 100%
Wedrose Acres 93 $114,491 99%
Spca of Tennessee 93 $189,417 83%
Arizona Poodle Rescue Inc 93 $658,982 100%
Better Days Inc 93 $181,989 99%
Fifty Shades of Furr Inc 93 $314,656 94%
Bullpen Way Station & Sanctuary Ltd 90 $151,835 93%
Clay County Animal Rescue & Education Center Inc 90 $136,295 100%

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 - 219 disclosed in the public registry.
Supplementary verification
ProPublica Nonprofit Explorer
Supplementary verification
Wikidata structured data
Supplementary verification
Charity Navigator

Data freshness

Last updated
May 27, 2026
Profile completeness
90%

What we don't know

Honest gaps - our score reflects transparency, not impact

Programs & projects
No named programs listed by the charity
Operating reach
Countries where programs run not specified

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.

Read full methodology

Quick facts about Zoological Society of Philadelphia

What is Zoological Society of Philadelphia?
Zoological Society of Philadelphia is a animal welfare publicly-supported charity (509(a)(2)) based in Philadelphia, United States. Zoological Society of Philadelphia is a animal welfare organization based in PHILADELPHIA, United States. Founded in 1859. Annual revenue: $54.7 million. 0% of spending goes directly to programs. EIN: 231352298.
When was Zoological Society of Philadelphia founded?
Zoological Society of Philadelphia was founded in 1859.
Who leads Zoological Society of Philadelphia?
Kathleen Horton serves as Chief Financial Officer.
Where is Zoological Society of Philadelphia located?
Headquartered in Philadelphia, United States.
What is Zoological Society of Philadelphia's annual budget?
Annual revenue for fiscal year 2025 is approximately $10M-$100M. 0% of expenses go to program services.
Is Zoological Society of Philadelphia trustworthy?
Zoological Society of Philadelphia has a GiveRadar Integrity Assessment of 84 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 Zoological Society of Philadelphia's registration number?
IRS EIN: 231352298.
What is Zoological Society of Philadelphia's website?
http://www.philadelphiazoo.org