Los Cerritos Wetlands Fund

The Marisla Foundation

Laguna Beach, CA

The Marisla Foundation funds marine and coastal conservation, biodiversity and sustainable ecosystem management, environmental health, and human services for women in crisis; human services grants are limited to Orange County and Los Angeles, while environmental work can be national or international. Its 2024 grants ranged from $10,000 to $9.89 million, with a median of $75,000. It accepts online applications during quarterly windows after an eligibility quiz; deadlines are January 15, April 15, July 15, and October 15.

E & S Hirsch Foundation a Calif

Seal Beach, CA

Orange County Community Foundation

Irvine, CA

The Orange County Community Foundation supports a wide range of causes, including human services, education, health, arts, the environment, and community development, primarily in Orange County and also beyond. Its 2025 grants had a median of $25,000, though amounts varied widely; it does not accept unsolicited requests.

National Fish and Wildlife Foundation

Washington, DC

The National Fish and Wildlife Foundation makes competitive grants for science-based projects that conserve or restore fish, wildlife, plants, and habitats; it does not fund advocacy or litigation. Its 2025 grants had a median of about $106,500, and it supports projects across all 50 states and U.S. territories. Applications are competitive and program-specific; whether pre-proposals are required varies by program.

Employees Community Fund of Boeing California Inc

Seal Beach, CA

Recognizing the need for continuing improvement in the quality of life, the Employees Community Fund of Boeing California supports a variety of programs aimed at making our communities better places to live. An employee board of directors distributes funds, with allocations based in large part on the amount of ecf member's contributions in each community and the comparative need.grants are widespread in terms of both geography and subject matter. Some of the most fascinating projects focus on nature and environmental concerns and others translate directly to enrichment and enjoyment through libraries, zoos, museums, symphony orchestras and public broadcasting. Donee organizations are selected from those that assist people and cities in areas where employees of boeing reside.ecf supports a wide range of vital human services, including health care, medical research, education, youth activities, and civic and cultural programs.

Silicon Valley Community Foundation

Mountain View, CA

Silicon Valley Community Foundation funds work in areas such as housing, economic security, education, health, the environment, arts and culture, and civic engagement, with Community Action Grants supporting local, community-led organizations in San Mateo and Santa Clara counties. Its 2024 grants had a median of $51,716, though amounts varied widely; applications depend on the program, and SVCF states that it does not accept unsolicited proposals for advised funds.

California Community Foundation

Los Angeles, CA

The California Community Foundation supports nonprofits through discretionary and donor-directed grants, with discretionary priorities including education, health, housing and immigration, alongside other areas such as arts, civic engagement and economic opportunity. Its 2025 grants had a median of $50,000, and its work is focused on Los Angeles County; prospective discretionary applicants are asked to contact the relevant program officer before submitting a letter of intent.

The William & Flora Hewlett Foundation

Menlo Park, CA

The William & Flora Hewlett Foundation funds education, climate and conservation, the arts, democracy, gender equity, racial justice, and efforts to strengthen nonprofits and philanthropy, with work spanning the San Francisco Bay Area, the U.S. West, and locations including East and West Africa and Mexico. Its 2024 grants had a median award of $150,000, though amounts varied widely. It generally does not accept unsolicited requests, but sometimes invites proposals through open processes.

Marin Community Foundation

Novato, CA

Marin Community Foundation funds work in affordable housing and homelessness, community resilience and power, as well as social services, education, arts and conservation, with a focus on marginalized Marin County residents and some broader U.S. and international grantmaking. Its 2025 grants had a median of $25,000, though amounts varied widely. The profile does not state whether it accepts unsolicited requests.

Direct Relief

Santa Barbara, CA

Direct Relief supports healthcare providers serving people affected by poverty or emergencies, including community health centers, clinics, and grassroots organizations, with medicines, supplies, and funding for health access and equity. In 2025, its grants had a median award of about $65,000, and its work spans all 50 U.S. states and countries around the world; the profile does not state whether it accepts unsolicited requests.

Conrad N Hilton Foundation

Westlake Village, CA

The Conrad N. Hilton Foundation funds nonprofits working to improve lives and alleviate poverty, with initiatives including early childhood development, homelessness, refugees, safe water, and support for foster and opportunity youth. Its work is global, and its 2024 grants had a median award of $76,000. It generally does not accept unsolicited requests, except through its Good Neighbor Program for eligible local nonprofits and Title 1 schools.

The San Diego Foundation

San Diego, CA

The San Diego Foundation funds nonprofit work in family well-being, education, the environment, and housing, including projects, capacity building, and general support that advance equity and resilient communities. Its 2025 grants had a median of $25,000, though amounts varied widely; applicants generally must be located in San Diego County and primarily serve county residents. It offers competitive grant opportunities through its online portal, but the profile does not state whether it accepts unsolicited requests.