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OLD WESTBURY GARDENS INC

EIN 11-1902968 OLD WESTBURY, NY

Revenue 2023
$4,814,359
Expenses 2023
$4,976,147

Program services were 78.1% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
Classification
2000
Street
PO BOX 430

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 · 2023

Mission

To inspire appreciation and knowledge of the early 20th century American country estate.

  • Gardens and Westbury House maintenance:OLD WESTBURY GARDENS IS ONE OF THE FEW REMAINING HISTORIC LONG ISLAND ESTATES OPEN TO THE PUBLIC AND ONE OF THE BEST PRESERVED OF ITS KIND IN AMERICA. PRESERVATION IS THE HIGHEST PRIORITY AND IN COORDINATION WITH THE BOARD OF TRUSTEES, COMMITTEES AND THE HORTICULTURE DEPARTMENT, THE GARDENS BUDGETS FOR CAPITAL PROJECTS AND THE PROTECTION AND RESTORATION OF THE LANDSCAPE, BUILDINGS AND HARDSCAPE. THE HORTICULTURE DEPARTMENT CULTIVATES AND MANAGES MORE THAN 200 ACRES OF FORMAL GARDENS, WOODLANDS, AND LAKES, MAINTAINING THE EXACTING STANDARDS REQUIRED TO PRESERVE THE GARDENS AND CREATE AN EXTRAORDINARY VISITOR EXPERIENCE. THE OPERATIONS DEPARTMENT PROVIDES MAINTENANCE, REPAIRS, AND STENGTHENING OF THE INFRASTRUCTURE OF OLD WESTBURY GARDENS.

    Expenses $2,685,483 · Revenue $778,223

  • Visitor services:Old Westbury Gardens offers an engaging visitor experience bringing history to life through onsite tours and interpretive programs that provide a rare window into the golden era of the American country house. Visitors are encouraged to freely explore the beautifully groomed gardens and historic Westbury House. In addition, Old Westbury Gardens plans and executes an extensive array of public programs including exhibits, lectures, concerts, holiday events, teas and group tours, secrets of the service wing tours. The Visitor Services Department manages all aspects of public programming, special events, commercial activity, volunteer support and the interpretive programs to ensure a high quality visitor experience.

    Expenses $971,438 · Revenue $257,422

  • Education and community services:Old Westbury Gardens' Education Program strives to educate the community through a variety of outdoor formal and informal program offerings. Since its inception, tens of thousands of students from over 80 local and out of state school districts use Old Westbury Gardens as an extension of their classrooms through formal, educator-led outdoor programs designed in conjunction with New York State Learning Standards. Over 10,000 Girl Scouts and Cub Scouts have earned merits and learned skills reinforcing a message of local community preservation. Children's and Family Programs such as Bug Safari, Bat Walk, Bird Walks, Stargazers, Summer Camps, Wellness Programs, Photography Workshops and more, highlight diverse environmental topics and themes and make the most of non-profit community partnerships.

    Expenses $227,160 · Revenue $185,129

As filed on the 2023 return.

Officers and directors · 2023

As listed in Part VII of the 2023 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Nancy Costopulos

    Form. President

    Total calculated
    $140,690
    From this org
    $123,761
    From related orgs
    $0
    Other
    $16,929
    Hours/week
    40

  • Daniel Albanese

    CFO

    Total calculated
    $121,062
    From this org
    $116,636
    From related orgs
    $0
    Other
    $4,426
    Hours/week
    40

  • Maura Brush

    President

    Total calculated
    $111,583
    From this org
    $97,722
    From related orgs
    $0
    Other
    $13,861
    Hours/week
    1

  • Carol E Large

    Chairman

    Total calculated
    $0
    Hours/week
    1

  • Laureen Stanton Knutsen

    Vice-Chairman

    Total calculated
    $0
    Hours/week
    1

  • John M Deignan

    Treasurer

    Total calculated
    $0
    Hours/week
    1

  • Anne B Byers

    Secretary

    Total calculated
    $0
    Hours/week
    1

  • Lieta Urry

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • John S Cochran

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Deidre O'Connell

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Jack Foley

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Jacques Busquet

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Frederic Bancroft

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Eric Krasnoff

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Thammanoune Kannalikham

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Arthur Levine

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Peter P Mackinnon

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Dita Amory Nickson

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Jeffrey SPhipps

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Lloyd P Zuckerberg

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Robert S Lemle

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Robert M Johnston

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Albert Kalimian

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Robert F Hussey

    Trustee

    Total calculated
    $0
    Hours/week
    1

  • Nathan Urbach

    Trustee

    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

  • 2023
    Revenue
    $4,814,359
    Expenses
    $4,976,147
    Contributions
    $3,282,113
    Grants paid
    $0
  • 2022
    Revenue
    $5,410,305
    Expenses
    $7,016,784
    Contributions
    $3,130,610
    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
    $6,489,449
    Expenses
    $6,275,703
    Assets (EOY)
    $41,739,187

  • 2021 · 990

    Revenue
    $6,489,449
    Expenses
    $6,275,703
    Assets (EOY)
    $41,739,187

  • 2020 · 990

    Revenue
    $4,989,281
    Expenses
    $3,665,258
    Assets (EOY)
    $42,110,626

  • 2018 · 990

    Revenue
    $5,487,137
    Expenses
    $4,768,612
    Assets (EOY)
    $33,707,839

  • 2017 · 990

    Revenue
    $4,512,499
    Expenses
    $4,611,368
    Assets (EOY)
    $34,975,653

  • 2016 · 990

    Revenue
    $4,048,375
    Expenses
    $3,999,143
    Assets (EOY)
    $32,877,952

  • 2015 · 990

    Revenue
    $4,269,977
    Expenses
    $4,024,016
    Assets (EOY)
    $33,179,163

  • 2014 · 990

    Revenue
    $5,179,011
    Expenses
    $4,476,881
    Assets (EOY)
    $34,577,169

  • 2013 · 990

    Revenue
    $4,842,457
    Expenses
    $4,636,773
    Assets (EOY)
    $35,279,175

  • 2012 · 990

    Revenue
    not reported
    Expenses
    $3,949,038
    Assets (EOY)
    $32,715,836

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

The 10 largest by cash amount. The API serves every itemized grant.

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 on its 2023 return

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 26 October 2026, for every organization at once. Returns through tax year 2023, the newest we have parsed for this organization.