Mount Washington Observatory
About
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Scientific research for government, education and industry.
Focus & reach
Verification & registration
Every mark links to the official registry entry and opens in a new tab.
Integrity assessment
A score from 0 to 100 for how openly a charity shares public information across five areas: registration, financial disclosure, governance, contact details, and data recency. It does not measure programme impact. See exactly what we do and do not have →
Financials
IRS Form 990Leadership at a glance
Official filingsSimilar charities
GiveRadar Intelligence
GiveRadar Analysis
GiveRadar's verified records show Mount Washington Observatory with a complete profile, cross-referenced across 4 independent sources including the IRS.
- It is one of the better-documented science & technology charities in the United States GiveRadar currently tracks, because GiveRadar has verified its financial disclosures and its governance. Most of those have little verified data on record yet. View this cohort
- Established in 1936, it predates 94% of the science & technology charities in the United States GiveRadar has a founding year for. 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 87% of the 3,236 science & technology charities in the United States with filings on record. See the filings
- government registration
- financial records (6 filed years)
- disclosed leadership
- a website
- a donation page
- third-party accreditation
Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.
Filing history
6 years on file from IRS Form 990: revenue, expenses, program spending, assets, and liabilities by fiscal year.
See 5 years of revenue, expense breakdowns, and balance sheet.
Sign up to viewTax deductibility
Whether a gift to Mount Washington Observatory lowers your own taxes depends on where you pay them. Choose your country to see the rule that applies.
Donations may be tax-deductible for residents of United States under local rules. Confirm with the charity directly.
MOUNT WASHINGTON OBSERVATORY 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.
This is general guidance, not tax advice. Confirm treatment with the charity or your tax advisor before donating.
Staff & volunteers
Leadership & board
Official filingsBoard members and senior officers on record, with disclosed pay where available.
25 officers and trustees on file, free with a GiveRadar account.
No red flags detected
Timeline
From official filingsKey dates from this charity's official filings, newest first.
In the news
No recent news coverage found
News coverage will appear here when articles mention this organization.
How it stacks up against peers
Compared with 8 similar science & technology charities in United States.
Cause areas in United States
Charities working in each area, this charity's highlighted.
Sources and verification
- Officers and trustees
- Internal Revenue Service (IRS) - Tax Exempt Organization Search · 104 disclosed in the public registry.
What we know and don't know
Every data point we track for this charity, and whether we have found it. Disclosure only, never a judgment of the charity's work.
Data freshness
How current this profile is, and when we last checked it against the official source.
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.
Read full methodologyIf you represent this organization and want to correct or update its data, you can claim this listing to edit details yourself, or email info@giveradar.com with the correct information. We review every request and respond within 30 days.
Frequently asked questions about Mount Washington Observatory
Mount Washington Observatory is a registered science & technology nonprofit based in North Conway, NH, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 1936 and has been operating for 90 years. Its EIN is 020225135. 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 90/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports $3M in annual revenue. 104 officers and directors are publicly disclosed. No red flags have been detected.
Mount Washington Observatory's highest-paid executive, Beth Newhouse, received $111,748 in reported compensation in its most recent filing (2025). This figure comes straight from the organization's official filing and covers salary plus other reportable pay. Executive pay generally scales with the size and complexity of a nonprofit, so it is best read alongside the organization's revenue and what it does.
Based on official filings, Mount Washington Observatory has $3M in annual revenue. It allocates 71% of expenses to programs and services. This is below the average of 81% for science & technology charities in United States. Its revenue is below the peer average of $15M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.
Current summit conditions higher summits forecast upcoming events observatory online shop we really Mount Washington Observatory is classified as a science & technology organization registered in United States. The organization was founded in 1936.
Mount Washington Observatory is classified as a Science & Technology 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 $3M in annual revenue. The organization has 104 disclosed officers and directors.
Mount Washington Observatory's EIN (Employer Identification Number) is 020225135. 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.
Mount Washington Observatory is located in North Conway, NH, United States. The organization was established in 1936 and has been active for 90 years.
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Quick facts about Mount Washington Observatory
- What is Mount Washington Observatory?
- Mount Washington Observatory is a science & technology supporting organization (509(a)(3)) based in North Conway, United States. Current summit conditions higher summits forecast upcoming events observatory online shop we really
- When was Mount Washington Observatory founded?
- Mount Washington Observatory was founded in 1936.
- Who leads Mount Washington Observatory?
- Beth Newhouse serves as Treasurer.
- Where is Mount Washington Observatory located?
- Headquartered in North Conway, NH, United States.
- What is Mount Washington Observatory's annual budget?
- Annual revenue for fiscal year 2025 is $2.7 million. 71% of expenses go to program services.
- Is Mount Washington Observatory trustworthy?
- Mount Washington Observatory has a GiveRadar Integrity Assessment of 90 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 Mount Washington Observatory's registration number?
- IRS EIN: 020225135.
- What is Mount Washington Observatory's website?
- http://www.mountwashington.org