Nonprofit · EIN 39-0689355
WATERTOWN HISTORICAL SOCIETY
Tax-exempt (reinstated) · WATERTOWN, WI 53094
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $665,084 | $117,731 | $547,353 | $1,901,114 | $0 | $1,901,114 |
| December 31, 2024 | 990 | $229,925 | $79,565 | $150,360 | $1,255,311 | $0 | $1,255,311 |
| December 31, 2023 | 990 | $223,867 | $96,649 | $127,218 | $1,073,478 | $0 | $1,073,478 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $623,301
- of which government grants
- $10,000
- Program service revenue
- $0
- Investment income
- $22,517
- Net income from fundraising events
- $15,649
- Net income from sales of inventory
- $3,617
- Other revenue
- $19,266
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $0
- Other salaries and wages
- $31,273
- Salaries, compensation and benefits (total)
- $33,513
- Professional fundraising fees
- $0
- Occupancy
- $14,050
- Depreciation
- $17,498
- Management and general (functional)
- $117,731
Balance sheet and other
- Total assets, start of year
- $1,255,311
- Total assets, end of year
- $1,901,114
- Total liabilities, end of year
- $0
- Net assets, end of year
- $1,901,114
- Land, buildings and equipment
- $595,264
- Publicly traded securities
- $1,284,036
- Net assets without donor restrictions
- $1,901,114
- Gross receipts
- $670,489
- Employees
- 6
- Volunteers
- 30
- State of legal domicile
- WI
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990 for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Melissa Lamp | President Trustee or director, Officer | 5 | $0 |
| Jim Baughler | Vice President Trustee or director, Officer | 0 | $0 |
| David Hertel | Director Trustee or director | 0 | $0 |
| Thomas O'Connor | Treasurer Trustee or director, Officer | 5 | $0 |
| Kyle Singer | Director Trustee or director | 0 | $0 |
| Steve Board | Director Trustee or director | 0 | $0 |
| Scott Robertson | Director Trustee or director | 0 | $0 |
| David Yelk | Director Trustee or director | 0 | $0 |
| Judy Lehman | Director Trustee or director | 0 | $0 |
| Nicole Little | Director Trustee or director | 0 | $0 |
| Braeden Nemitz | Director Trustee or director | 0 | $0 |
| Jill Nadeau | Director Trustee or director | 0 | $0 |
| Paul Mueller | Director Trustee or director | 0 | $0 |
990 for the year ended December 31, 2024: 12 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Melissa Lamp | President Trustee or director, Officer | 10 | $0 |
| Jim Baughler | Vice Preside Trustee or director, Officer | 0 | $0 |
| David Hertel | Director Trustee or director | 0 | $0 |
| Thomas O'Connor | Treasurer Trustee or director, Officer | 5 | $0 |
| Ken Riedel | Director Trustee or director | 10 | $0 |
| Steve Board | Director Trustee or director | 0 | $0 |
| Scott Robertson | Director Trustee or director | 0 | $0 |
| David Yelk | Director Trustee or director | 0 | $0 |
| Judy Lehman | Director Trustee or director | 0 | $0 |
| Nicole Little | Director Trustee or director | 0 | $0 |
| Jill Nadeau | Director Trustee or director | 0 | $0 |
| Paul Mueller | Director Trustee or director | 0 | $0 |
990 for the year ended December 31, 2023: 11 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Ken Riedel | Director Trustee or director | 10 | $0 |
| Steve Board | Director Trustee or director | 0 | $0 |
| David Yelk | Director Trustee or director | 0 | $0 |
| Judy Lehman | Director Trustee or director | 0 | $0 |
| Scott Pirkel | Director Trustee or director | 0 | $0 |
| Jill Nadeau | Secretary Trustee or director | 0 | $0 |
| Paul Mueller | Director Trustee or director | 0 | $0 |
| Melissa Lamp | President Officer | 10 | $0 |
| Jim Baughler | Vice Preside Officer | 0 | $0 |
| David Hertel | Director Officer | 0 | $0 |
| Thomas O'Connor | Treasurer Officer | 5 | $0 |
Address and contacts
- Address (IRS master file)
- 919 CHARLES ST, WATERTOWN, WI 53094-5001
- Principal officer (990 for 2025)
- Thomas O'Connor, 919 Charles Street, Watertown, WI 53094
- Signed the 990
- Thomas O'Connor, Treasurer
- Phone
- (920) 261-2796
- Website
- watertownhistory.com
- Return prepared by
- SANFT ACCOUNTING AND TAX LLC
Mission
The society operates a museum, which is a three story octagon house built in 1854.
Program accomplishments
- The society operates a museum, which is a three story octagon house built in 1854.
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 39-0689355
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2014
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Public and societal benefit (W99)
- Assets (IRS master file)
- $1,901,114
- Income (IRS master file)
- $670,489
Revocation and reinstatement
- Exemption revoked
- May 15, 2013
- Posted by the IRS
- August 12, 2013
- Reinstated
- Effective May 15, 2013
From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $665,084 | $117,731 | $1,901,114 | IRS |
| 990 | December 2024 | $229,925 | $79,565 | $1,255,311 | IRS |
| 990 | December 2023 | $223,867 | $96,649 | $1,073,478 | XML |
| 990 | December 2022 | $77,604 | $70,743 | $890,559 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 39-0689355).
Questions about WATERTOWN HISTORICAL SOCIETY
- What is the EIN of WATERTOWN HISTORICAL SOCIETY?
- The employer identification number (EIN) of WATERTOWN HISTORICAL SOCIETY is 39-0689355.
- Is WATERTOWN HISTORICAL SOCIETY tax-exempt?
- Yes. The IRS revoked its exemption on May 15, 2013 and reinstated it effective May 15, 2013.
- Are donations to WATERTOWN HISTORICAL SOCIETY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does WATERTOWN HISTORICAL SOCIETY file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of WATERTOWN HISTORICAL SOCIETY due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did WATERTOWN HISTORICAL SOCIETY last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of WATERTOWN HISTORICAL SOCIETY?
- The 990 for the year ended December 31, 2025 names Thomas O'Connor.
- Who are the officers and directors of WATERTOWN HISTORICAL SOCIETY?
- The 990 for the year ended December 31, 2025 lists 13 people; 0 received compensation from the organization.
- How much revenue does WATERTOWN HISTORICAL SOCIETY have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $665,084, expenses of $117,731 and total assets of $1,901,114 at year end.
Other nonprofits in WATERTOWN
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- WATERTOWN SHARE THE ROAD EIN 81-4184426 · last filed 990-N for 2025
- COLE STROHBUSCH FAMILY MEMORIAL FOUNDATION EIN 41-3294080 · last filed 990-N for 2025
- HEROES FOR HEROES INC EIN 84-2760677 · last filed 990-N for 2025
- ABLELIGHT INC EIN 39-0806446 · last filed 990 for 2025
- ILLUMINUS RETIREMENT COMMUNITIES INC EIN 61-1517711 · last filed 990 for 2025
- GREATER WATERTOWN COMMUNITY HEALTH FOUNDATION INC EIN 39-1030310 · last filed 990 for 2025
- COMMONHEART INC EIN 39-1940920 · last filed 990 for 2025
All nonprofits in WATERTOWN · Wisconsin · Public and societal benefit