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Maryland · NTEE D

Animal-Related Nonprofits in Maryland

Givalgo Discover indexes 50 active animal-related nonprofits headquartered in Maryland. The list below is sorted by reported revenue on the most recent Form 990 indexed for each organisation.

Top 50 by reported revenue

From the most recent Form 990 indexed for each organisation. Click an org for full diligence detail.

#OrganisationRevenue
1NATIONAL AQUARIUM INC
EIN 52-1121163
$54.4M
2THE MARYLAND ZOOLOGICAL SOCIETY INC
EIN 52-0996352
$25.0M
3ALLEY CAT ALLIES INCORPORATED
EIN 52-1742079
$22.3M
4THE HUMANE LEAGUE
EIN 04-3817491
$22.1M
5AMERICAN ASSOCIATION OF ZOOLOGICAL PARKS AND AQUARIUMS INC
EIN 55-0526930
$20.9M
6GENTLE GIANTS DRAFT HORSE RESCUE SOCIETY LTD
EIN 59-3822764
$11.7M
7AAALAC INTERNATIONAL INC
EIN 36-2549660
$9.7M
8BORN FREE USA UNITED WITH ANIMAL PROTECTION INSTITUTE
EIN 94-6187633
$8.3M
9MARYLAND SPCA INC
EIN 52-6001558
$8.2M
10BALTIMORE ANIMAL RESCUE AND CARE SHELTER INC
EIN 86-1130456
$8.0M
11LAST CHANCE ANIMAL RESCUE INC
EIN 52-2328626
$6.7M
12AMERICAN FISHERIES SOCIETY INC
EIN 54-0683803
$6.1M
13HUMANE SOCIETY OF WASHINGTON COUNTY INCORPORATED
EIN 52-0542025
$3.7M
14MONTGOMERY COUNTY HUMANE SOCIETY INC
EIN 52-6044968
$3.6M
15DAYS END FARM HORSE RESCUE INC
EIN 52-1759077
$3.5M
16WILDLIFE HABITAT COUNCIL INC
EIN 52-1558579
$3.5M
17ALLEY CAT RESCUE INC
EIN 52-2279100
$3.3M
18THE WILDLIFE SOCIETY
EIN 52-0788946
$3.2M
19HUMANE SOCIETY OF BALTIMORE COUNTY INC
EIN 52-0623165
$3.2M
20FERRY COVE SHELLFISH INC
EIN 84-4611271
$3.0M
21CENTER FOR A HUMANE ECONOMY INC
EIN 83-2620507
$2.9M
22DEFENDERS OF ANIMAL RIGHTS INC
EIN 52-1061126
$2.9M
23HART FOR ANIMALS INC
EIN 82-0584608
$2.9M
24GLOBAL WILDLIFE TRUST INC
EIN 20-1935855
$2.8M
25NATIONAL AQUARIUM FOUNDATION INC
EIN 52-1301162
$2.7M
26HUMANE SOCIETY OF HARFORD COUNTY INC
EIN 52-0567970
$2.7M
27SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS OF A A CO MD IN
EIN 52-0609154
$2.6M
28ANIMAL OUTLOOK INC
EIN 52-2034417
$2.3M
29WATERFOWL FESTIVAL INC
EIN 23-7801345
$2.2M
30HUMANE SOCIETY OF CARROLL CO INC
EIN 52-0689149
$2.0M
31MARYLAND HORSE BREEDERS ASSOCIATION INC
EIN 52-0580070
$2.0M
32PLUMPTON PARK ZOOLOGICAL GARDENS INC
EIN 52-1548155
$1.9M
33HUMANE SOCIETY OF WICOMICO COUNTY INC
EIN 23-7015204
$1.8M
34TALBOT HUMANE CO
EIN 52-0636395
$1.7M
35ANIMALS ANGELS INCORPORATED
EIN 20-8780367
$1.6M
36RUDE RANCH ANIMAL RESCUE INC
EIN 52-2312763
$1.4M
37HUMANE SOCIETY OF KENT COUNTY INCORPORATED
EIN 52-0796950
$1.4M
38FOXIE G FOUNDATION INC
EIN 46-0986465
$1.3M
39PATUXENT ANIMAL WELFARE SOCIETY
EIN 52-2001456
$1.3M
40COMPANIONS AND ANIMALS FOR REFORM AND EQUITY INC
EIN 85-0557068
$1.1M
41SECOND CHANCE WILDLIFE CENTER INC
EIN 52-1927600
$1.1M
42ALLEGANY COUNTY ANIMAL SHELTER MANAGEMENT FOUNDATION
EIN 52-2292769
$1.1M
43WORCESTER COUNTY HUMANE SOCIETY INCORPORATED
EIN 52-1122738
$1.0M
44LAB RESCUE OF LRCP INCORPORATED
EIN 52-1880024
$988K
45WILDFOWL TRUST OF NORTH AMERICA INC
EIN 52-1188939
$961K
46POPLAR SPRING ANIMAL SANCTUARY INC
EIN 52-1970569
$952K
47HUMANE SOCIETY OF CHARLES COUNTY INC
EIN 52-1212430
$910K
48CENTRE FOR WILDLIFE STUDIES INC
EIN 84-3990793
$837K
49SMALL MIRACLES CAT AND DOG RESCUE INC
EIN 20-4323931
$828K
50CAROLINE COUNTY HUMANE SOCIETY INC
EIN 52-1528421
$810K

Featured organizations

A representative cross-section beyond the revenue ranking, from national institutions to small community groups and private foundations, chosen for complete, recent IRS filings.

Frequently asked questions about animal-related nonprofits in Maryland

Answers compiled from the IRS Form 990, BMF, Pub 78, and Auto-Revocation List.

How many animal-related nonprofits operate in Maryland?
Every IRS-registered animal-related nonprofit in Maryland appears in the Givalgo Discover index. The top 50 by reported revenue are listed on this page; the full set is searchable on discover.givalgo.ai.
What's the largest animal-related nonprofit in Maryland?
The single largest animal-related nonprofit in Maryland by reported total revenue is shown at the top of the list on this page, sourced from each organisation's most recent IRS Form 990 filing.
How do I vet a animal-related nonprofit in Maryland before donating?
Use Givalgo Discover's free profile for the organisation: it cross-references the IRS Auto-Revocation List, IRS Publication 78, and the IRS Business Master File, and exposes the latest Form 990 financials and governance signals on a single page.
Are donations to Maryland animal-related nonprofits tax-deductible?
Federal deductibility is determined by IRS Publication 78 status, not state location. Donations to a Pub 78-listed animal-related nonprofit in Maryland are tax-deductible at the federal level; Maryland state tax treatment may differ.
Where do animal-related nonprofits in Maryland file their Form 990?
All US tax-exempt organisations file Form 990 with the IRS at the federal level. There is no state-specific filing for the federal exemption itself. Maryland state charity registration is a separate state-level requirement.