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Maine Historical Society

EIN 01-0211530 · Portland, ME

Public records show a registered, tax-exempt organization in good standing.

LegitimacyPassesRegistration and standingFinancial healthGood70 out of 100GovernanceStrong100 out of 100Impact evidenceDescribes programsHow well its results are evidenced

What it says it does

Maine Historical Society, founded in 1822, is a private non-profit whose mission is to preserve and share Maine's story. Based in Portland, we work closely with communities and partners throughout the state, and serve a statewide and global audience, reaching people interested in Maine throughout the world. Our core program areas include the Brown Research Library, the MHS Museum which includes the Wadsworth-Longfellow House (1785-6), and the Maine Memory Network (www.mainememory.net), our nationally recognized digital platform. Through these activities, MHS serves approximately 500,000 people each year on our campus, through outreach programs, and online.

Income
$1.9 million
Spending
$3.0 million
Spent on programs
69%
Reserves
26.3 months of spending
Largest source of income
donations and private grants, 55%
Employees
40
Volunteers
14
Highest pay
$148,458, executive director

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Financial health

Good: 70 out of 100. Higher than 47% of charities in its peer group (arts and culture, $1m to $10m).

  • Reserves

    35 of 35

    Spendable reserves would cover 26.3 months of spending.

  • Debt

    20 of 20

    It owes 4% of what it owns.

  • Living within its means

    0 of 15

    Spending exceeded income by 56% of income.

  • Income trend

    0 of 15

    Income fell 33% on the year before.

  • Spending floor

    15 of 15

    69% of spending went to programs and raising each dollar of donations cost 24 cents.

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Governance

Strong: 100 out of 100. Higher than 65% of charities in its peer group (arts and culture, $1m to $10m).

  • Independent board

    25 of 25

    24 of 24 voting board members are independent.

  • Conflict of interest policy

    15 of 15

    Has a written conflict of interest policy.

  • Whistleblower policy

    8 of 8

    Has a written whistleblower policy.

  • Record keeping policy

    7 of 7

    Has a written policy on keeping and destroying records.

  • Board minutes

    5 of 5

    Keeps minutes of board meetings.

  • Board sees the tax return

    10 of 10

    Gave the board a copy of this return before filing it.

  • Pay set independently

    5 of 5

    Sets its chief executive's pay through independent review and comparison.

  • Independent check of accounts

    15 of 15

    Its accounts were audited by an independent accountant.

  • No reported misuse

    10 of 10

    Reports no diversion of assets, excess benefits or loans to insiders.

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Impact evidence

Describes programs. Its tax return describes what it does but we have found no measurable results in it.

Programs described in its return (2)
  1. $1.1 million spent. The Brown Research Library provides access to the most comprehensive collection of archival material related to Maine history and serves researchers, scholars, educators, students, genealogists, the general public, and professionals from many fields. Major recent acquisitions include the archives of the Central Maine Power Company, Bangor Theological Seminary, the Merrill Companies, Maine Medical Center, landscape architect Patrick Chasse, and architect Carol Wilson. We recently completed major collections initiatives related to our early Maine photography, Portland Press Herald, Glass Plate Negative, clothing, architecture, and Proprietors and Northeast Boundary collections. MHS also supports extensive scholarly and collections activities. We publish the scholarly journal Maine History with the History Department at the University of Maine and regularly host fellowships and scholarly forums. We also partner with and provide archival, curatorial, storage, and other services to individuals, institutions, and businesses
  2. $1.0 million spent. The MHS Museum offers tours of the Wadsworth-Longfellow House, changing exhibitions, and public programs that use Maine history to provide information, context, and perspective for issues of contemporary interest and concern. Recent major initiatives explored immigration, veterans' issues, Maine's food heritage and economy, Maine's evolving paper industry, and 13,000 years of Wabanaki presence in and stewardship of Maine. Each includes an exhibition, digital resources, extensive public programs delivered via Zoom, and educational resources that support remote learning. All are available online. Last year's exhibition, Notorious: Maine Crime in the Public Eye, 1690-1940, explored Maine's fascination with true crime.

Source: Form 990 for the year ending June 30, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate

Legitimacy checks

  1. Is it registered with the IRS? Passed.

    Listed in the IRS master file of tax-exempt organizations as a 501(c)(3) charitable organization.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  2. Has the IRS revoked its tax-exempt status? Passed.

    Not on the IRS automatic revocation list.

    Source: Automatic revocation of exemption list, Internal Revenue Service, file dated September 30, 2026.

  3. Are donations tax-deductible? Passed.

    On the IRS list of organizations eligible to receive tax-deductible contributions.

    Source: Publication 78 data: organizations eligible for tax-deductible contributions, Internal Revenue Service, file dated September 10, 2026.

  4. Is it keeping up with its IRS filings? Passed.

    Most recent return on file covers the year ending June 2025.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  5. How long has it been tax-exempt? Passed.

    Recognized by the IRS since April 1938.

    Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated September 7, 2026.

  6. Is it in good standing with state regulators? Passed.

    Not on California's list of charities barred from soliciting. Other states are not yet checked.

    Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 7, 2026.

Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.