Nonprofits in San Mateo, California
Nonprofits in San Mateo, California. Browse 663 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.
Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.
Nonprofit profiles
- Levmade Inc
EIN 472338082 · Headquarters: SAN MATEO, CA, USA · Employment · Latest available filing year: 2017 · Primary form: IRS Form 990
- Li & Liu Family Foundation
EIN 813628242 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Light Conference
EIN 823597301 · Headquarters: San Mateo, CA, US · Health Care · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Linear Park Inc
EIN 680529959 · Headquarters: San Mateo, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990
- Lions International District 4C4
EIN 510213386 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990
- Little League Baseball Inc San Mateo Little League American
EIN 943155401 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Little Wonders: A Parent-Child Center
EIN 943212702 · Headquarters: San Mateo, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Looking Glass Korean School
EIN 464791794 · Headquarters: San Mateo, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Lost Cats
EIN 882624040 · Headquarters: San Mateo, CA, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Lukas Timothy Cvi Inc Dba Little Bear Sees
EIN 454588192 · Headquarters: SAN MATEO, CA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2020 · Primary form: IRS Form 990-PF
- Luna Grove Inc
EIN 994640619 · Headquarters: San Mateo, CA, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Luso-american Financial a Fraternal Benefit Society
EIN 942519404 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Makeknowledge
EIN 821007599 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Mango Tours Foundation
EIN 823333911 · Headquarters: San Mateo, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- Manos Unidas Contigo Peru
EIN 562622214 · Headquarters: San Mateo, CA, US · International, Foreign Affairs & National Security · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- Marble Arch Test Prep & Tutoring
EIN 472190338 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ
- Marin County Shrine Club
EIN 237133131 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Masterworks Chorale Society
EIN 942901785 · Headquarters: SAN MATEO, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- Mayoguatemala Foundation Co
EIN 933928253 · Headquarters: San Mateo, CA, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Medical Computer Research Foundation of Ca Inc
EIN 260881587 · Headquarters: San Mateo, CA, US · Medical Research · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- Medlendorg
EIN 943361681 · Headquarters: SAN MATEO, CA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Memory Trust Foundation
EIN 264753258 · Headquarters: San Mateo, CA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Mfcc Redwood City California
EIN 810992843 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Microsurgical Transplantation Research Foundation
EIN 946123393 · Headquarters: San Mateo, CA, USA · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Mid-peninsula Ice Rink Foundation
EIN 814402784 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Mid-peninsula Ice Rink Foundation 2021
EIN 863876631 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Millbrae-support Our Schools
EIN 881228248 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ
- Millbrae-support Our Students
EIN 823057885 · Headquarters: SAN MATEO, CA, USA · Civil Rights, Social Action & Advocacy · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ
- Minority Television Project Inc
EIN 942975155 · Headquarters: SAN MATEO, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Mission Hospice & Home Care Inc
EIN 942567162 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Mission Miracle Mile Inc
EIN 203593750 · Headquarters: San Mateo, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ
- Monterey Peninsula Shrine Club
EIN 237133132 · Headquarters: SAN MATEO, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Montessori Parents Committee of Parkside Sch Inc Claudia Kelly
EIN 942507617 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- More Than Qualified
EIN 465607140 · Headquarters: SAN MATEO, CA, USA · Employment · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Mpact Foundation
EIN 993180093 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990
- Mpowering
EIN 272315598 · Headquarters: SAN MATEO, CA, US · International, Foreign Affairs & National Security · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Mtg Health and Wellness Inc
EIN 830624013 · Headquarters: San Mateo, CA, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Museum of Reconstructions Inc
EIN 522079940 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- NAMI San Mateo County
EIN 942650681 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association on Alcohol Drugs and Disability Inc
EIN 391865922 · Headquarters: San Mateo, CA, US · Mental Health & Crisis Intervention · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- National Young Mens Service League
EIN 300682953 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Naturalena Foundation
EIN 841935351 · Headquarters: San Mateo, CA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990
- Nature Bloomers
EIN 881205686 · Headquarters: San Mateo, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- New Courant
EIN 920453833 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- New Time Church Inc
EIN 994720273 · Headquarters: SAN MATEO, CA, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Newcomers Club of San Mateo County
EIN 330850479 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Newton Center Inc
EIN 943401055 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Next Level Sports Foundation Inc
EIN 462161844 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990
- Night Out Night Off
EIN 862626617 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Nineteenth Avenue Park Homeowners Association Inc
EIN 943135873 · Headquarters: san mateo, CA, US · Housing & Shelter · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Nisei Ski Club
EIN 941681239 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Norcal Cge Baseball Corp
EIN 931515539 · Headquarters: San Mateo, CA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990
- Norcal Edtech Inc
EIN 453534337 · Headquarters: San Mateo, CA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Norcal Rockets Inc
EIN 472905964 · Headquarters: SAN MATEO, CA, US · Recreation & Sports · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Norcal Shomrim
EIN 263987599 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Norma Gist Peoples' Free Child Development Program Inc
EIN 237294255 · Headquarters: San Mateo, CA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- North Central Neighborhood Assn
EIN 942977281 · Headquarters: San Mateo, CA, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- North Central Student Foundation
EIN 463224440 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- North Highland Avenue 1233 Corp
EIN 862047819 · Headquarters: SAN MATEO, CA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990
- North Peninsula Mandarin School
EIN 942614106 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Northern Calif State Softball Assoc
EIN 942604924 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- Northern California Coalition of Genetic Counselors
EIN 844877806 · Headquarters: San Mateo, CA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Northern California Surgical Quality Collaborative
EIN 453054601 · Headquarters: San Mateo, CA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ
- Nuoc Solutions
EIN 922802906 · Headquarters: San Mateo, CA, US · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Nus America Inc
EIN 912172361 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ocean Ranch Boulevard 3605 Corp
EIN 463726713 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- One Hundred Club of San Mateo County
EIN 237179241 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Ongley R Ocon Inc
EIN 832557129 · Headquarters: San Mateo, CA, USA · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ
- Orchid Conservation Alliance
EIN 202382586 · Headquarters: SAN MATEO, CA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990
- Organization of Chinese-americans Inc
EIN 943133357 · Headquarters: San Mateo, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Our Neighborhood Voices - Education Corporation
EIN 331492373 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Palisades of San Mateo Owners Association
EIN 832178097 · Headquarters: San Mateo, CA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Palo Alto Institute
EIN 202643367 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF
- Palo Alto Oaks Baseball Inc
EIN 201210614 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ
- Panamanian Society of Arts and Culture
EIN 331505758 · Headquarters: San Mateo, CA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Parkridge Avenue 517 Corp
EIN 464261662 · Headquarters: SAN MATEO, CA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- Parkside Montessori PTA
EIN 946184899 · Headquarters: San Mateo, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Patricia Mayberry Hobe Foundation
EIN 942991235 · Headquarters: SAN MATEO, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2013 · Primary form: IRS Form 990-PF
- Paul J BOSCHETTO Foundation
EIN 471156307 · Headquarters: San Mateo, CA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Peace Action of San Mateo County
EIN 942922245 · Headquarters: SAN MATEO, CA, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Peking University Education Foundation (USA)
EIN 943278466 · Headquarters: SAN MATEO, CA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990
- Peninsula Ballet Theatre
EIN 946137593 · Headquarters: SAN MATEO, CA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- Peninsula Bay Volleyball Officials
EIN 881099176 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Peninsula Chinese Family Foundation
EIN 823695036 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Peninsula Clergy Network
EIN 731723866 · Headquarters: San Mateo, CA, US · Religion Related · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- Peninsula Community Services Inc
EIN 943297920 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Peninsula Conflict Resolution Center
EIN 770144000 · Headquarters: SAN MATEO, CA, USA · Crime & Legal Related · Latest available filing year: 2024 · Primary form: IRS Form 990
- Peninsula Estate Planning Council
EIN 942449103 · Headquarters: San Mateo, CA, US · Human Services · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Peninsula Family Service
EIN 941186169 · Headquarters: SAN MATEO, CA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Peninsula Girls Fastpitch Associati
EIN 811000842 · Headquarters: SAN MATEO, CA, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990
- Peninsula Golf & Country Club
EIN 940318810 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Peninsula Grace Notes
EIN 943197901 · Headquarters: San Mateo, CA, US · Health Care · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Peninsula Italian American Social Club Scholarship Foundation
EIN 943353368 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Peninsula Multifaith Coalition Inc
EIN 811038540 · Headquarters: San Mateo, CA, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Peninsula Orchid Society Inc
EIN 946078396 · Headquarters: San Mateo, CA, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Peninsula Soccer Referee Association
EIN 475017738 · Headquarters: San Mateo, CA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- People in the Mirror Inc
EIN 934388710 · Headquarters: SAN MATEO, CA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Pharmaceutical & Bioscience Society International
EIN 510647493 · Headquarters: San Mateo, CA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Pharmaceutical and Bioscience Society International
EIN 611640566 · Headquarters: SAN MATEO, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Phi Epsilon Phi Sorority
EIN 237025648 · Headquarters: SAN MATEO, CA, USA · Education · Latest available filing year: 2010 · Primary form: IRS Form 990