The William and Diane Nitterhouse
The William and Diane Nitterhouse Foundation is a private family foundation established in 1987 and based in Chambersburg, Pennsylvania. The foundation operates as a 501(c)(3) organization with no employees.
Financial Overview
From 2025 IRS Form 990-PF · View filing
Total Assets
$661K
+3.8% YoY
Annual Giving
$1K
+11.4% YoY
Grant Count
3
+0.0% YoY
Avg Grant Size
$408.333
+11.4% YoY
Under IRS private-foundation payout rules, The William and Diane Nitterhouse reported a distributable amount of $75K for 2025 — the minimum it must pay out in qualifying distributions.
Mission & Focus Areas
The foundation's grant-making priorities include:
- Education
- Philanthropy, Voluntarism & Grantmaking
- Health Care
The foundation focuses its giving primarily in Pennsylvania and Maryland.
Grantmaking
No application process information is available in the provided sources.
Average Grant
amount and median grant amount data not specified in available sources
How to Apply
**
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Geographic Focus
Where this funder awards grants
The foundation primarily funds organizations in Pennsylvania and Maryland.
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
Most Recent Financial Data (Fiscal Year Ending June 2025):
- Total assets: $661,304
- Total revenues: $32,257
- Total expenses: $7,762
- Investment income and dividends: $38,727
- Number of employees: 0
Prior Year Comparison (Fiscal Year Ending June 2024):
- Total assets: $921,512
- Total revenues: $21,955
- Investment income and dividends: $38,492
Contact Information:
- Address: PO Box 2013, Chambersburg, PA 17201-0813
- Telephone: 717-229-1245
- EIN: 23-2493715
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $661,304 | $636,998 | $617,805 |
| Revenue | $32,257 | $21,955 | $36,177 |
| Expenses | $7,762 | $2,696 | $1,582 |
| Qualifying Distributions | $4,441 | $1,846 | $742 |
| Net Investment Income | $34,024 | $36,213 | $33,950 |
| Distributable Amount | $75,358 | $60,134 | $53,252 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2025
Grant Size Distribution
44 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2025 grants, the largest include Franklin County Library - Ladies Afternoon Club ($600), New Birth Council of Freedom ($500), National Park Foundation ($125).
| Recipient | Purpose | Amount |
|---|---|---|
| FRANKLIN COUNTY LIBRARY - LADIES AFTERNOON CLUB CHAMBERSBURG, PA | GENERAL DONATIOJN | $600 |
| NEW BIRTH COUNCIL OF FREEDOM DILSBURG, PA | GENERAL DONATION | $500 |
| NATIONAL PARK FOUNDATION BALTIMORE, MD | GENERAL DONATION | $125 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2025 IRS filing
From 2025 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| WILLIAM K NITTERHOUSE | TRUSTEE | 1 | — |
| DIANE R NITTERHOUSE | TRUSTEE | 0.5 | — |
| KAREN N DILLER | TRUSTEE | 0.5 | — |
| LAURA E MARTIN | TRUSTEE | 0.5 | — |
Frequently Asked Questions
What does The William and Diane Nitterhouse fund?
The foundation's grant-making priorities include: • Education • Philanthropy, Voluntarism & Grantmaking • Health Care The foundation focuses its giving primarily in Pennsylvania and Maryland.
How do I apply for a grant from The William and Diane Nitterhouse?
**Grant Characteristics:** • Typical award range: $100–$600 • Total giving (most recent filing): $1,225 • Average grant amount and median grant amount data not specified in available sources **Application Process:** No application process information is available in the provided sources.
Where does The William and Diane Nitterhouse make grants?
The foundation primarily funds organizations in Pennsylvania and Maryland.
What size grants does The William and Diane Nitterhouse award?
In 2025, The William and Diane Nitterhouse awarded 3 grants totaling $1K — an average of about $408.333 per grant, based on its IRS Form 990 filings.
How much is The William and Diane Nitterhouse required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2025, The William and Diane Nitterhouse reported a distributable amount of $75K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is The William and Diane Nitterhouse's EIN?
The William and Diane Nitterhouse's EIN (Employer Identification Number) is 23-2493715. IRS Form 990 filing data is available on this page for 2021–2025.
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Data last updated June 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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