Nonprofit · EIN 39-0875968
MARATHON COUNTY HISTORICAL SOCIETY
Tax-exempt · WAUSAU, WI 54403
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $5,841,668 | $752,603 | $5,089,065 | $19,984,623 | $285,684 | $19,698,939 |
| December 31, 2024 | 990 | $3,237,587 | $656,885 | $2,580,702 | $14,011,844 | $27,746 | $13,984,098 |
| December 31, 2023 | 990 | $399,407 | $653,211 | -$253,804 | $10,873,990 | $18,423 | $10,855,567 |
| December 31, 2021 | 990 | $399,165 | $477,186 | -$78,021 | $11,467,889 | $17,352 | $11,450,537 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $5,496,284
- of which government grants
- $74,871
- Membership dues
- $19,185
- Program service revenue
- $26,331
- Investment income
- $307,919
- Net rental income
- $10,472
- Other revenue
- $11,134
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $67,500
- Other salaries and wages
- $260,627
- Salaries, compensation and benefits (total)
- $352,511
- Professional fundraising fees
- $0
- Accounting fees
- $13,450
- Occupancy
- $91,228
- Travel
- $1,519
- Depreciation
- $88,224
- Program services (functional)
- $496,317
- Management and general (functional)
- $256,286
Balance sheet and other
- Total assets, start of year
- $14,011,844
- Total assets, end of year
- $19,984,623
- Total liabilities, end of year
- $285,684
- Net assets, end of year
- $19,698,939
- Land, buildings and equipment
- $5,958,152
- Publicly traded securities
- $6,745,907
- Net assets without donor restrictions
- $3,628,306
- Net assets with donor restrictions
- $16,070,633
- Gross receipts
- $5,841,668
- Employees
- 27
- Volunteers
- 151
- Year formed
- 1952
- 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 |
|---|---|---|---|
| BLAKE OPAL-WAHOSKE | EXECUTIVE DI Trustee or director, Officer | 40 | $67,500 |
| BRETT BARKER | DIRECTOR Trustee or director | 0.25 | $0 |
| BILL BERTRAM | DIRECTOR Trustee or director | 0.25 | $0 |
| SANDI CIHLAR | DIRECTOR Trustee or director | 0.25 | $0 |
| SAM CRIPPS | SECRETARY Trustee or director, Officer | 0.25 | $0 |
| PATRICK GOSZ | TREASURER Trustee or director, Officer | 0.25 | $0 |
| JOHN HATTENHAUER | VICE PRESIDE Trustee or director, Officer | 0.25 | $0 |
| LAUREL HOFFMANN | DIRECTOR Trustee or director | 0.25 | $0 |
| GREG HUBER | DIRECTOR Trustee or director | 0.25 | $0 |
| JANE JANKE JOHNSON | DIRECTOR Trustee or director | 0.25 | $0 |
| RICHARD LOHR | DIRECTOR Trustee or director | 0.25 | $0 |
| DOROTHY MAXFIELD | DIRECTOR Trustee or director | 0.25 | $0 |
| STEVE MILLER | DIRECTOR Trustee or director | 0.25 | $0 |
| ANDREW DUDLEY SHANNON | DIRECTOR Trustee or director | 0.25 | $0 |
| BRIAN WILLIAMS | DIRECTOR Trustee or director | 0.25 | $0 |
2 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| RUSSEL WILSON | PRESIDENT Trustee or director, Officer | 0.25 | $0 |
| DUWAYNE ZAMZOW | DIRECTOR Trustee or director | 0.25 | $0 |
990 for the year ended December 31, 2024: 18 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| BLAKE OPAL-WAHOSKE | EXECUTIVE DI Trustee or director, Officer | 40 | $41,250 |
| MARY FORER | EXECUTIVE DI Trustee or director, Officer | 21.5 | $18,334 |
| BRETT BARKER | DIRECTOR Trustee or director | 0.25 | $0 |
| BILL BERTRAM | DIRECTOR Trustee or director | 0.25 | $0 |
| SANDI CIHLAR | DIRECTOR Trustee or director | 0.25 | $0 |
| SAM CRIPPS | DIRECTOR Trustee or director | 0.25 | $0 |
| PATRICK GOSZ | TREASURER Trustee or director, Officer | 0.25 | $0 |
| JOHN HATTENHAUER | VICE PRESIDE Trustee or director, Officer | 0.25 | $0 |
| LAUREL HOFFMANN | DIRECTOR Trustee or director | 0.25 | $0 |
| GREG HUBER | DIRECTOR Trustee or director | 0.25 | $0 |
| JANE JANKE JOHNSON | DIRECTOR Trustee or director | 0.25 | $0 |
| RICHARD LOHR | DIRECTOR Trustee or director | 0.25 | $0 |
| DOROTHY MAXFIELD | DIRECTOR Trustee or director | 0.25 | $0 |
| STEVE MILLER | SECRETARY Trustee or director, Officer | 0.25 | $0 |
| ANDREW DUDLEY SHANNON | DIRECTOR Trustee or director | 0.25 | $0 |
| BRIAN WILLIAMS | DIRECTOR Trustee or director | 0.25 | $0 |
| RUSS WILSON | PRESIDENT Trustee or director, Officer | 0.25 | $0 |
| DUWAYNE ZAMZOW | DIRECTOR Trustee or director | 0.25 | $0 |
990 for the year ended December 31, 2023: 17 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARY FORER | EXECUTIVE DI Trustee or director | 21.5 | $39,059 |
| BRETT BARKER | DIRECTOR Trustee or director | 0.25 | $0 |
| BILL BERTRAM | DIRECTOR Trustee or director | 0.25 | $0 |
| SANDI CIHLAR | DIRECTOR Trustee or director | 0.25 | $0 |
| PAT GOSZ | TREASURER Trustee or director, Officer | 0.25 | $0 |
| JOHN HATTENHAUER | VICE PRESIDE Trustee or director, Officer | 0.25 | $0 |
| LAUREL HOFFMANN | DIRECTOR Trustee or director | 0.25 | $0 |
| GREG HUBER | DIRECTOR Trustee or director | 0.25 | $0 |
| JANE JANKE JOHNSON | DIRECTOR Trustee or director, Officer | 0.25 | $0 |
| ROBERT HAGGE JR | DIRECTOR Trustee or director | 0.25 | $0 |
| RICHARD LOHR | DIRECTOR Trustee or director | 0.25 | $0 |
| DOROTHY MAXFIELD | DIRECTOR Trustee or director | 0.25 | $0 |
| STEVE MILLER | SECRETARY Trustee or director, Officer | 0.25 | $0 |
| ANDREW DUDLEY SHANNON | DIRECTOR Trustee or director | 0.25 | $0 |
| BRIAN WILLIAMS | DIRECTOR Trustee or director | 0.25 | $0 |
| RUSS WILSON | PRESIDENT Trustee or director, Officer | 0.25 | $0 |
| DUWAYNE ZAMZOW | DIRECTOR Trustee or director | 0.25 | $0 |
990 for the year ended December 31, 2021: 17 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARY FORER | EXECUTIVE DI Trustee or director | 40 | $37,570 |
| BRETT BARKER | DIRECTOR Trustee or director | 0.25 | $0 |
| BILL BERTRAM | DIRECTOR Trustee or director | 0.25 | $0 |
| SANDI CIHLAR | DIRECTOR Trustee or director | 0.25 | $0 |
| PAT GOSZ | TREASURER Trustee or director, Officer | 0.25 | $0 |
| JIM HAMPTON | DIRECTOR Trustee or director | 0.25 | $0 |
| JOHN HATTENHAUER | VICE PRESIDE Trustee or director, Officer | 0.25 | $0 |
| LAUREL HOFFMANN | DIRECTOR Trustee or director | 0.25 | $0 |
| GREG HUBER | DIRECTOR Trustee or director | 0.25 | $0 |
| JANE JANKE JOHNSON | DIRECTOR Trustee or director, Officer | 0.25 | $0 |
| ROBERT HAGGE JR | DIRECTOR Trustee or director | 0.25 | $0 |
| RICHARD LOHR | DIRECTOR Trustee or director | 0.25 | $0 |
| DOROTHY MAXFIELD | DIRECTOR Trustee or director | 0.25 | $0 |
| ANDREW DUDLEY SHANNON | SECRETARY Trustee or director, Officer | 0.25 | $0 |
| BRIAN WILLIAMS | DIRECTOR Trustee or director | 0.25 | $0 |
| RUSS WILSON | PRESIDENT Trustee or director, Officer | 0.25 | $0 |
| DUWAYNE ZAMZOW | DIRECTOR Trustee or director | 0.25 | $0 |
Address and contacts
- Address (IRS master file)
- 410 MCINDOE ST, WAUSAU, WI 54403-4745
- Principal officer (990 for 2025)
- RUSSEL WILSON, 1515 ADAMS COURT, WAUSAU, WI 54403
- Signed the 990
- PATRICK GOSZ, TREASURER
- Phone
- (715) 842-5750
- Return prepared by
- KERBERROSE SC
Mission
TO FOSTER AND PROMOTE THE STUDY OF THE HISTORY OF MARATHON COUNTY AND THE SURROUNDING AREA, AND IN CONNECTION THEREWITH, TO COLLECT, PRESERVE, AND DISPLAY HISTORICAL RECORDS, DOCUMENTS, AND OBJECTS FOR FUTURE GENERATIONS.
Program accomplishments
- MUSEUM EXHIBITS & PROGRAMS PROVIDE EDUCATION BOTH WITHIN THE MUSEUM & AT OUTSIDE LOCATIONS. EXPENSES INCLUDE COSTS FOR: LECTURES, TOURS, MOVIES, SLIDE SHOWS, TRAVEL, ARTIFACTS, AND RESEARCH.Expenses $496,317 · revenue $26,331
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
- 39-0875968
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 1954
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A82Z)
- Assets (IRS master file)
- $19,984,623
- Income (IRS master file)
- $5,841,668
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $5,841,668 | $752,603 | $19,984,623 | XML |
| 990 | December 2024 | $3,237,587 | $656,885 | $14,011,844 | XML |
| 990 | December 2023 | $399,407 | $653,211 | $10,873,990 | XML |
| 990 | December 2022 | $413,887 | $557,200 | $10,191,445 | IRS |
| 990 | December 2021 | $399,165 | $477,186 | $11,467,889 | XML |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2018 | – | – | – | 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 39-0875968).
Questions about MARATHON COUNTY HISTORICAL SOCIETY
- What is the EIN of MARATHON COUNTY HISTORICAL SOCIETY?
- The employer identification number (EIN) of MARATHON COUNTY HISTORICAL SOCIETY is 39-0875968.
- Is MARATHON COUNTY HISTORICAL SOCIETY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1954.
- Are donations to MARATHON COUNTY HISTORICAL SOCIETY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does MARATHON COUNTY 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 MARATHON COUNTY 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 MARATHON COUNTY 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 MARATHON COUNTY HISTORICAL SOCIETY?
- The 990 for the year ended December 31, 2025 names RUSSEL WILSON.
- Who are the officers and directors of MARATHON COUNTY HISTORICAL SOCIETY?
- The 990 for the year ended December 31, 2025 lists 17 people; 1 received compensation from the organization, the highest $67,500 (BLAKE OPAL-WAHOSKE, EXECUTIVE DI).
- How much revenue does MARATHON COUNTY HISTORICAL SOCIETY have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $5,841,668, expenses of $752,603 and total assets of $19,984,623 at year end.
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All nonprofits in WAUSAU · Wisconsin · Arts, culture and humanities