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HISTORICAL SOCIETY OF DELAWARE

EIN 51-0066731 WILMINGTON, DE

Largest nonprofits in Delaware

Revenue 2024
$3,892,895
Expenses 2024
$2,837,225

Program services were 70.7% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
A540
Classification
2000
Street
505 MARKET STREET

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2024

Mission

SEE SCHEDULE O.

Activities or mission (Part I)

PRESERVATION OF DELAWARE HISTORY. THE SOCIETY'S PRIMARY GOAL IS THE PRESERVATION OF HISTORY, PARTICULARLY THAT RELATING TO THE STATE OF DELAWARE. THE SOCIETY MAINTAINS TWO MUSEUMS, A LIBRARY, AND SEVERAL OTHER HISTORIC BUILDINGS PROVIDING CULTURAL AND EDUCATIONAL SERVICES TO THE COMMUNITY.

  • RESEARCH LIBRARY-HOUSES THE HISTORICAL SOCIETY'S PAPER-BASED COLLECTION WHICH IS AVAILABLE TO PERSONS RESEARCHING DELAWARE HISTORY.

    Expenses $492,767 · Revenue $4,325

  • DELAWARE HISTORY MUSEUM-THE MUSEUM PRESENTS THE HISTORY OF DELAWARE THROUGH PERMANENT AND ROTATING EXHIBITIONS. CLASSROOMS, EXHIBITION GALLERIES AND OTHER SPACES ENABLE HISTORICAL SOCIETY EDUCATIONAL STAFF TO PRESENT EDUCATIONAL PROGRAMS, LECTURES AND GUIDED TOURS FOCUSED ON DELAWARE HISTORY. THE MUSEUM INCLUDES THE MITCHELL CENTER FOR AFRICAN AMERICAN HERITAGE, THE ONLY CENTER FOR AFRICAN AMERICAN HISTORY IN DELAWARE, AS A PERMANENT EXHIBITION AND PROGRAM CENTER.

    Expenses $591,639 · Revenue $27,071

  • READ HOUSE & GARDENS- A NATIONAL LANDMARK PROPERTY SERVES AS AN EARLY FEDERAL-ERA MUSEUM PRESENTING SOCIAL AND CULTURAL HISTORY THROUGH GUIDED TOURS AND PUBLIC PROGRAMS.

    Expenses $366,335

  • OTHER PROGRAM SERVICES OFFERED BY THE SOCIETY CONSIST OF THE FOLLOWING: - OLD TOWN HALL MUSEUM 21,046 - ADVANCEMENT AND OUTREACH PROGRAMS 287,362 - DELAWARE HISTORY PUBLICATION 18,256 - OTHER MISCELLANEOUS PROGRAMS 34,351 - TOTAL OTHER PROGRAM SERVICES 361,015

    Expenses $555,058

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Stephen Kingsberry

    BOARD CHAIR

    Total calculated
    $0
    Hours/week
    2
  • Kevin McGonegal

    VICE CHAIR

    Total calculated
    $0
    Hours/week
    2
  • Robert R Davis

    2ND VICE CHA

    Total calculated
    $0
    Hours/week
    2
  • Lewis Lazarus

    SECRETARY

    Total calculated
    $0
    Hours/week
    2
  • Dan Scholl

    VICE SECRETA

    Total calculated
    $0
    Hours/week
    2
  • Ronald Samuels

    TREASURER

    Total calculated
    $0
    Hours/week
    2
  • Jerry Bilton

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Cara Blume

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Gregory T Chambers

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Kathleen Kreusch Cobb

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • The Hon Nancy Cook

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Bruce Flournoy Dalleo

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Carla Durante

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Anne M Farley

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Elizabeth Higginbotham PhD

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Karen Ingram

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Howard Kristol

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Lavar Matthews

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Mary Ann Kelly MacDonald

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Mary Kate McLaughlin

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Margaret Proctor

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Laura Sanders Morris

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • James Simmons III

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Will Spruance

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Laura St Martin

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

The first 25 listed. Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $3,892,895
    Expenses
    $2,837,225
    Contributions
    $2,007,983
    Grants paid
    $0
  • 2023
    Revenue
    $2,229,988
    Expenses
    $2,549,482
    Contributions
    $1,462,853
    Grants paid
    $0
  • 2022
    Revenue
    $2,160,783
    Expenses
    $2,745,408
    Contributions
    $1,377,412
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $2,630,334
    Expenses
    $2,541,659
    Assets (EOY)
    $25,921,900
  • 2020 · 990

    Revenue
    $2,375,420
    Expenses
    $2,260,247
    Assets (EOY)
    $28,427,187
  • 2019 · 990

    Revenue
    $2,764,455
    Expenses
    $2,130,364
    Assets (EOY)
    $25,358,344
  • 2018 · 990

    Revenue
    $1,329,736
    Expenses
    $1,838,716
    Assets (EOY)
    $25,759,939
  • 2017 · 990

    Revenue
    $1,375,032
    Expenses
    $1,884,990
    Assets (EOY)
    $26,364,761
  • 2016 · 990

    Revenue
    $2,553,321
    Expenses
    $1,957,227
    Assets (EOY)
    $26,556,303
  • 2015 · 990

    Revenue
    $1,550,035
    Expenses
    $1,770,156
    Assets (EOY)
    $24,895,423
  • 2014 · 990

    Revenue
    $5,335,652
    Expenses
    $1,736,792
    Assets (EOY)
    $25,886,491
  • 2013 · 990

    Revenue
    $2,322,248
    Expenses
    $1,749,104
    Assets (EOY)
    $23,108,201
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $1,828,809
    Assets (EOY)
    $21,070,125

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared as related by

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.