Skip to main content
IRS-authorized e-file provider · not the IRS

Nonprofit · EIN 52-6049239

GEOLOGICAL SOCIETY OF WASHINGTON INC

Tax-exempt · ROCKVILLE, MD 20848

Address and contacts

Address (IRS master file)
PO BOX 382, ROCKVILLE, MD 20848-0382
In care of
% MINERALOGICAL SOCIETY OF AMERICA
Mailing address (990-N for 2025)
PO Box 382, Rockville MD 20848
Principal officer (990-N for 2025)
Andrew Campbell, 13803 Vista Dr, Rockville MD 20853

What it must file and when

IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026990-N on file
2024June 30, 2025November 17, 2025990-N on file
2023June 30, 2024November 15, 2024990-N on file

File the 2026 990-N for GEOLOGICAL SOCIETY OF WASHINGTON INC

Due November 15, 2027 · e-filed with the IRS by 990.tax, an IRS-authorized e-file provider

IRS record

EIN
52-6049239
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
1977
Accounting year ends
June
Files
Form 990-N (e-Postcard)

Filing history

FormYear endedRevenueExpensesAssetsReturn
990-N for 2025
Officer: Andrew Campbell
June 30, 2026≤ $50,000 receipts––e-Postcard
990-N for 2024
Officer: Andrew Campbell
June 30, 2025≤ $50,000 receipts––e-Postcard
990-N for 2023
Officer: Mark Fuhrmann
June 30, 2024≤ $50,000 receipts––e-Postcard
990-N for 2022
Officer: Mark Fuhrmann
June 30, 2023≤ $50,000 receipts––e-Postcard
990-N for 2020
Officer: Elizabeth Stevenson
June 30, 2021≤ $50,000 receipts––e-Postcard
990-N for 2019
Officer: Ester Sztein
June 30, 2020≤ $50,000 receipts––e-Postcard
990-N for 2018
Officer: Carl-Henry Geschwind
June 30, 2019≤ $50,000 receipts––e-Postcard

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 52-6049239).

Questions about GEOLOGICAL SOCIETY OF WASHINGTON INC

What is the EIN of GEOLOGICAL SOCIETY OF WASHINGTON INC?
The employer identification number (EIN) of GEOLOGICAL SOCIETY OF WASHINGTON INC is 52-6049239.
Is GEOLOGICAL SOCIETY OF WASHINGTON INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1977.
Are donations to GEOLOGICAL SOCIETY OF WASHINGTON INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does GEOLOGICAL SOCIETY OF WASHINGTON INC file?
Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
When is the next return of GEOLOGICAL SOCIETY OF WASHINGTON INC due?
The return for tax year 2026 (the year ending June 30, 2027) is due November 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did GEOLOGICAL SOCIETY OF WASHINGTON INC last file with the IRS?
The latest return in the IRS public files is the 990-N for 2025 for the year ended June 30, 2026.
Who is the principal officer of GEOLOGICAL SOCIETY OF WASHINGTON INC?
The 990-N for 2025 names Andrew Campbell.

Other nonprofits in ROCKVILLE

All nonprofits in ROCKVILLE · Maryland