The John and Mary Neff Foundation

Foundation · Grantmaker DECATUR, GA EIN: 58-6403590

The John and Mary Neff Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in DECATUR, GA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $2.3M in total assets. In 2024, it awarded 12 grants totaling $2.1M. Net investment income was $568K.

Key facts about The John and Mary Neff Foundation

EIN: 58-6403590
Latest 990 filing: Form 990-PF, 2024
Annual giving (2024): $2,110,000
Grants made (2024): 12
Average grant: $175,833
Median grant: $15,000
Total assets: $2,279,791
Primary geography: District of Columbia (50% of itemized 2024 grant dollars)

Data from IRS Form 990-PF, 2024; updated April 2026.

Who The John and Mary Neff Foundation funds

By grant dollars, the top recipient states for The John and Mary Neff Foundation's 12 itemized 2024 grants were District of Columbia (50%), Massachusetts (36%) and Georgia (14%). The most frequent recipient cities were Atlanta, GA (6 grants), Washington Dc, DC (2 grants) and Washington, DC (2 grants). None of its 12 grants with a stated purpose were described as general or operating support.

How The John and Mary Neff Foundation gives

92% of 2024 grantees were also funded in 2023. Method
Giving grew 1106% from 2021 to 2024. Method
In 2024 it paid out well above its IRS minimum distribution (the 5% rule). Method

Estimate from itemized IRS Form 990-PF grant lists (2024). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.

Financial Overview

From 2024 IRS Form 990-PF · View filing

Total Assets

$2.3M

-27.6% YoY

Annual Giving

$2.1M

+15.3% YoY

Grant Count

-40.0% YoY

Avg Grant Size

$176K

+92.2% YoY

Under IRS private-foundation payout rules, The John and Mary Neff Foundation reported a distributable amount of $164K for 2024 — the minimum it must pay out in qualifying distributions.

About The John and Mary Neff Foundation

Based on IRS filings

Focus Areas

Philanthropy, Voluntarism & Grantmaking

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

District of Columbia $1.1M (50%)

Massachusetts $750K (36%)

Georgia $300K (14%)

Share of all 12 itemized 2024 grant dollars.

States

California District of Columbia Georgia Massachusetts

Cities

AtlantaWashingtonDecaturWashington DcCambridgeMariettaStanford

Financial History

Multi-year comparison from IRS filings

Revenue

Expenses

Qualifying Distributions

Net Investment Income

Metric	2024	2023	2022
Total Assets	$2,279,791	$3,147,818	$4,915,645
Revenue	$1,291,230	$121,810	$75,695
Expenses	$2,159,257	$1,889,637	$370,298
Qualifying Distributions	$2,119,304	$1,842,084	$312,941
Net Investment Income	$568,354	$73,303	$119,170
Distributable Amount	$163,996	$230,323	$248,935

Data update history

When this profile's IRS filing data changed on Grantable

March 1, 2026 IRS filings on file for fiscal years 2020–2024

Giving Over Time

Total grant dollars and number of grants per year

Grant Insights

How this funder distributes its grants

Top Recipients

Top 10 recipients in 2024

Grant Size Distribution

46 grants across all recorded years

Giving History

Grant recipients and amounts by year

Among its reported 2024 grants, the largest recipients include Center for Science in the Public Interest ($750,000), Union of Concerned Scientists ($750,000), Community Foundation of Greater Atlanta ($250,000).

Recipient	Purpose	Amount
CENTER FOR SCIENCE IN THE PUBLIC INTEREST WASHINGTON DC, DC	To envision a healthy population with reduced impact and burden of preventable diseases and an equitable food system that makes healthy, sustainable food accessible to all.	$750,000
UNION OF CONCERNED SCIENTISTS CAMBRIDGE, MA	to use rigorous, independent science to solve our planet's most pressing problems	$750,000
COMMUNITY FOUNDATION OF GREATER ATLANTA ATLANTA, GA	Enhance the quality of life in Atlanta by providing expert philanthropic services.	$250,000
SOCIETY FOR SCIENCE & THE PUBLIC WASHINGTON DC, DC	To promote the understanding and appreciation of science and the vital role it plays in human advancement: to inform, educate, and inspire.	$200,000
MATHMATICAL ASSOC OF AMERICA WASHINGTON, DC	Public policy efforts to recruit and retain minority and female students into undergraduate mathematics and mathematics-intensive fields.	$100,000
HORIZONS ATLANTA ATLANTA, GA	to support a six-week summer learning experience that supports students from underserved communities throughout their K-12 academic careers	$20,000
GOOD SAMARITAN HEALTH CENTER ATLANTA, GA	Work to remove the barriers preventing low-income families from obtaining access to quality healthcare in the Atlanta area.	$10,000
NATIONAL PARK FOUNDATION WASHINGTON, DC	to preserve unimpaired the natural and cultural resources and values of the National Park System for the enjoyment, education, and inspiration of this and future generations.	$10,000
FOOD WELL ALLIANCE ATLANTA, GA	To provide resources and support to local Georgia growers to connect and build healthier communities through an equitable, local food ecosystem in which everyone can participate and benefit.	$5,000
GEORGIA ORGANICS ATLANTA, GA	To invest in Georgia's organic farmers for the health of our communities and the land.	$5,000

Leadership & Key People

Officers and directors from IRS filings

Compensation Overview

From 2024 IRS filing

Name	Title	Hours	Compensation
Connie L Kertz	Trustee	1	$25,795

Subject Areas

Focus areas based on grantmaking activity

Philanthropy, Voluntarism & Grantmaking

Frequently Asked Questions

What is The John and Mary Neff Foundation?

The John and Mary Neff Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in DECATUR, GA. It holds $2.3M in total assets as of 2024.

How large is The John and Mary Neff Foundation?

As of 2024, The John and Mary Neff Foundation holds $2.3M in total assets with $1.3M in annual revenue. It awarded 12 grants totaling $2.1M in 2024.

Where does The John and Mary Neff Foundation operate?

The John and Mary Neff Foundation has awarded grants in California, District of Columbia, Georgia, Massachusetts.

What size grants does The John and Mary Neff Foundation award?

In 2024, The John and Mary Neff Foundation awarded 12 grants totaling $2.1M — an average of about $176K per grant, based on its IRS Form 990 filings.

How much is The John and Mary Neff Foundation required to give away each year?

Private foundations must generally distribute about 5% of their assets annually. For 2024, The John and Mary Neff Foundation reported a distributable amount of $164K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.

What is The John and Mary Neff Foundation's EIN?

The John and Mary Neff Foundation's EIN (Employer Identification Number) is 58-6403590. IRS Form 990 filing data is available on this page for 2020–2024.