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WATERTOWN HISTORICAL SOCIETY

EIN 39-0689355 WATERTOWN, WI

Browse the largest nonprofits in Wisconsin

Revenue 2025
$665,084
Expenses 2025
$117,731

Program services were 0.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
W99
Classification
2000
Street
919 CHARLES ST

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).

Mission and programs · 2025

Mission

The society operates a museum, which is a three story octagon house built in 1854.

  • The society operates a museum, which is a three story octagon house built in 1854.

As filed on the 2025 return.

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Melissa Lamp

    President

    Total calculated
    $0
    Hours/week
    5
  • Jim Baughler

    Vice President

    Total calculated
    $0
    Hours/week
    0
  • David Hertel

    Director

    Total calculated
    $0
    Hours/week
    0
  • Thomas O'Connor

    Treasurer

    Total calculated
    $0
    Hours/week
    5
  • Kyle Singer

    Director

    Total calculated
    $0
    Hours/week
    0
  • Steve Board

    Director

    Total calculated
    $0
    Hours/week
    0
  • Scott Robertson

    Director

    Total calculated
    $0
    Hours/week
    0
  • David Yelk

    Director

    Total calculated
    $0
    Hours/week
    0
  • Judy Lehman

    Director

    Total calculated
    $0
    Hours/week
    0
  • Nicole Little

    Director

    Total calculated
    $0
    Hours/week
    0
  • Braeden Nemitz

    Director

    Total calculated
    $0
    Hours/week
    0
  • Jill Nadeau

    Director

    Total calculated
    $0
    Hours/week
    0
  • Paul Mueller

    Director

    Total calculated
    $0
    Hours/week
    0

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

  • 2025
    Revenue
    $665,084
    Expenses
    $117,731
    Contributions
    $623,301
    Grants paid
    $0
  • 2024
    Revenue
    $229,925
    Expenses
    $79,565
    Contributions
    $194,790
    Grants paid
    $0
  • 2023
    Revenue
    $223,867
    Expenses
    $96,649
    Contributions
    $190,330
    Grants paid
    $0
  • 2022
    Revenue
    $77,604
    Expenses
    $70,743
    Contributions
    $51,532
    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
    $506,414
    Expenses
    $93,330
    Assets (EOY)
    $935,168
  • 2020 · 990

    Revenue
    $63,528
    Expenses
    $61,353
    Assets (EOY)
    $533,297

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.

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

Other IRS files

Auto-Revocation List

  • Exemption revoked 15 May 2013, reinstated 15 May 2013.

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 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2025, the newest we have parsed for this organization.