Question 1

Is The Mark Twain House & Museum a tax-exempt 501(c)(3)?

Accepted Answer

Yes — The Mark Twain House & Museum is recognised by the IRS as a 501(c)(3) organisation (EIN 06-0685118). The IRS recognised The Mark Twain House & Museum as tax-exempt in April 1938.

Question 2

What is The Mark Twain House & Museum's EIN?

Accepted Answer

The Mark Twain House & Museum's Employer Identification Number (EIN) is 06-0685118. The EIN was assigned by the IRS in April 1938. Donors and grantmakers use the EIN to verify tax-exempt status with the IRS.

Question 3

What does The Mark Twain House & Museum do?

Accepted Answer

From this House. Mark Twain changed the way the world sees America and the way americans see themselves.

Question 4

Where is The Mark Twain House & Museum located?

Accepted Answer

The Mark Twain House & Museum is located at 351 Farmington Avenue, Hartford, CT, 06105.

Question 5

When was The Mark Twain House & Museum founded or recognised by the IRS?

Accepted Answer

The Mark Twain House & Museum was recognised by the IRS as a tax-exempt organisation in April 1938. The IRS ruling date is the earliest authoritative date available for most US nonprofits.

Question 6

What is The Mark Twain House & Museum's annual revenue?

Accepted Answer

On its most recent Form 990 (fiscal year 2025), The Mark Twain House & Museum reported $4.0M in total revenue and $3.6M in total expenses.

Question 7

Has The Mark Twain House & Museum been auto-revoked by the IRS?

Accepted Answer

No — The Mark Twain House & Museum (EIN 06-0685118) does not appear on the IRS Auto-Revocation List. Givalgo Discover cross-references the IRS Auto-Revocation List on every profile load; if status changes, this page reflects it.

Question 8

Is The Mark Twain House & Museum listed in IRS Publication 78?

Accepted Answer

Yes — The Mark Twain House & Museum is listed in IRS Publication 78 as an organisation eligible to receive tax-deductible charitable contributions. Pub 78 status is the canonical IRS signal that donations to an org are deductible.

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The Mark Twain Memorial

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