Marin Conservation League
The mission of marin conservation league is to preserve, protect and enhance the natural assets of marin in a changing environment.
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Since 1934, MCL has worked to acquire and preserve some of Marin's defining public lands. We advocate for the treasured natural and cultural resources of Marin.
Verified certifications
Confirmed against the issuing authority - not self-reported.
Mission
The mission of marin conservation league is to preserve, protect and enhance the natural assets of marin in a changing environment.
Focus areas & reach
· What they work on and whereHow it stacks up against peers
· vs. 8 similar environment in United StatesConcerns
· None foundWhere every $1 goes
· FY2025 · IRS 990 (FY2025)GiveRadar Analysis
Original analysis from GiveRadar's dataset of comparable organizations
GiveRadar's verified records show Marin Conservation League with a complete profile, cross-referenced across 3 independent sources including the IRS.
- Established in 1940, it is among the oldest environment charities in the United States GiveRadar tracks. View this cohort
- GiveRadar holds a more complete profile for this organization than for 98% of the 30,143 environment charities in the United States it tracks, because GiveRadar has verified its financial disclosures and its registration. Most of those have little verified data on record yet. View this cohort
- GiveRadar holds 6 years of financial filings for this organization, the most recent for fiscal year 2025 - a deeper filing history than 90% of the 13,585 environment charities in the United States with filings on record. See the filings
- government registration
- financial records (6 filed years)
- disclosed leadership
- a website
- a contact email
- a donation page
- an owner-submitted profile claim
Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.
Common questions
· Auto-generated from filings + methodologyMarin Conservation League is a registered environment nonprofit based in San Rafael, CA, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1940 and has been operating for 86 years. Its EIN is 946089780. According to GiveRadar's records, it holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. GiveRadar's Integrity Assessment for the organization is 86/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports $686K in annual revenue. 92 officers and directors are publicly disclosed. No red flags have been detected.
Marin Conservation League's EIN (Employer Identification Number) is 946089780. This is the organization's IRS tax identification number; you can use it to verify tax-exempt status and to look up its Form 990 filings with the IRS.
Marin Conservation League has a GiveRadar Integrity Assessment of 86/100. 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 86 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. The charity allocates 75% of expenses to programs, which contributes positively to its score. For comparison, the average integrity assessment for environment charities in United States is 90/100.
Marin Conservation League is located in San Rafael, CA, United States. The organization was established in 1940 and has been active for 86 years.
Based on official tax filings, Marin Conservation League has $686K in annual revenue. It allocates 75% of expenses to programs and services. This is in line with the average of 72% for environment charities in United States. Its revenue is below the peer average of $2M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.
Marin Conservation League is classified as an Environment organization, registered in United States. It operates as a Supporting organization (509(a)(3)). By size, it is categorized as a medium organization. It has $686K in annual revenue. The organization has 92 disclosed officers and directors.
No red flags have been detected for Marin Conservation League. 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.
According to GiveRadar's records, Marin Conservation League holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. It is registered with the Internal Revenue Service (IRS). It reports that 75% of expenses go to programs (the peer average is 72%). You can donate directly through their official donation page linked on their GiveRadar profile. GiveRadar provides data for research and does not endorse any organization. A GiveRadar Integrity Assessment reflects how much public data is available, not whether an organization is safe to donate to, so it is always smart to do your own research before giving.
Since 1934, MCL has worked to acquire and preserve some of Marin's defining public lands. We advocate for the treasured natural and cultural resources of Marin. Marin Conservation League is classified as an environment organization registered in United States. The organization was founded in 1940.
Among environment charities registered in United States: It allocates 75% of expenses to programs, in line with the peer average of 72%. Its annual revenue of $686K is below the peer average of $2M.
Yes, donations to Marin Conservation League are generally tax-deductible in the United States. Marin Conservation League is a 501(c)(3) tax-exempt organization. Its EIN is 946089780, 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.
Filing history
6 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.
MARIN CONSERVATION LEAGUE 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.
Staff & volunteers
From filings and published profiles
Leadership
From FY2025 filing
Officers & trustees (25)
Source: Public filings
25 officers and trustees on file - free with a GiveRadar account.
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
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Sources and verification
- 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 - 92 disclosed in the public registry.
- Supplementary verification
- Charity Navigator
Data freshness
What we know and don't know
Exactly which public data we hold on this charity. Our score reflects transparency, not impact.
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Financial data · FY2025 on record
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Named leadership · 92 officers on file
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Government registration · Registered with an official registry
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Mission statement · Published
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Official website · On record
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Headquarters address · On file
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Direct contact · Email or phone published
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Tax-deductibility · Verified
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Founding date · 1940
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Executive payTop-officer pay not disclosed
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Programs & activitiesNo named programs listed by the charity
Methodology
GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.
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Quick facts about Marin Conservation League
- What is Marin Conservation League?
- Marin Conservation League is a environment supporting organization (509(a)(3)) based in San Rafael, United States. Since 1934, MCL has worked to acquire and preserve some of Marin's defining public lands. We advocate for the treasured natural and cultural resources of Marin.
- When was Marin Conservation League founded?
- Marin Conservation League was founded in 1940.
- Who leads Marin Conservation League?
- Richard Jensen serves as Treasurer.
- Where is Marin Conservation League located?
- Headquartered in San Rafael, CA, United States.
- What is Marin Conservation League's annual budget?
- Annual revenue for fiscal year 2025 is approximately $100K-$1M. 75% of expenses go to program services.
- Is Marin Conservation League trustworthy?
- Marin Conservation League has a GiveRadar Integrity Assessment of 86 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 Marin Conservation League's registration number?
- IRS EIN: 946089780.
- What is Marin Conservation League's website?
- http://marinconservationleague.org