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CHICAGO HORTICULTURAL SOCIETY

EIN 36-2225482 GLENCOE, IL

Browse the largest nonprofits in Illinois

Revenue 2024
$68,147,549
Expenses 2024
$73,382,562

Program services were 80.9% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
C410
Classification
2000
Street
1000 LAKE COOK RD

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).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2024

Mission

WE CULTIVATE THE POWER OF PLANTS TO SUSTAIN AND ENRICH LIFE

Activities or mission (Part I)

WE CULTIVATE THE POWER OF PLANTS TO SUSTAIN AND ENRICH LIFE. THE CHICAGO HORTICULTURAL SOCIETY OPERATES THE CHICAGO BOTANIC GARDEN ON LAND OWNED BY THE FOREST PRESERVE DISTRICT OF COOK COUNTY.

  • HORTICULTURAL PROGRAMS - THE GARDEN COMPRISES 385 ACRES, INCLUDING 81 ACRES OF LAKES AND WATERWAYS, A 15 ACRE ILLINOIS PRAIRIE, AND 100 ACRES OF NATIVE WOODLANDS. THERE ARE 28 DISPLAY GARDENS REPRESENTING UNIQUE DESIGNS, SUCH AS THE ENGLISH WALLED GARDEN, THE JAPANESE GARDEN, AND THE FRUIT AND VEGETABLE ISLAND. IN 2024, THE PLANT COLLECTION OF THE GARDEN TOTALS 2.73M LIVING PLANTS. THE TOTAL NUMBER OF ACTIVE ACCESSIONS (ACCESSION RECORDS) IS 29,543 WITH THE TAXA IN THE PERMANENT COLLECTIONS NUMBERING 14,200. A TOTAL OF 235 FAMILIES ARE REPRESENTED. THE PLANT COLLECTIONS DEPARTMENT AT THE GARDEN OVERSEES THE ACQUISITION OF PLANTS AND SEEDS FROM NURSERIES, ARBORETA, BOTANIC GARDENS, PLANT BREEDING PROGRAMS, AND COLLECTING EXPEDITIONS TO MANY FOREIGN COUNTRIES.

    Expenses $19,311,756 · Revenue $2,673,009

  • VISITOR SERVICES: 1,300,000 PEOPLE VISITED THE GARDEN IN 2024, FROM THROUGHOUT THE CHICAGO AREA, THE MIDWEST, THE NATION AND THE WORLD. THE GARDEN FEATURES A WIDE VARIETY OF INDOOR AND OUTDOOR EVENTS, ACTIVITIES, PROGRAMMING AND EXHIBITIONS. THE GARDEN ALSO HOSTS DOZENS OF FLOWER SHOWS AND SALES, AND IS THE SITE OF EDUCATIONAL PROGRAMMING FOR VISITORS OF ALL AGES AND WEEKEND FAMILY CLASSES.

    Expenses $15,506,913 · Revenue $1,504,455

  • PLANT CONSERVATION - THE GARDEN IS RECOGNIZED AS AN IMPORTANT PLAYER IN INTERNATIONAL PLANT CONSERVATION AND A LEADER IN ORNAMENTAL PLANT DEVELOPMENT. ITS PLANT BREEDING, EVALUATION, AND INTRODUCTION EFFORTS ARE CREATING NEW AND IMPROVED PLANTS FOR MIDWEST GARDENS, AND ITS DIVISION OF PLANT SCIENCE AND CONSERVATION IS WORKING ON THE MOST PRESSING ENVIRONMENTAL ISSUES OF OUR TIME, INCLUDING INVASIVENESS, LOSS OF PLANT SPECIES BIODIVERSITY, AND HABITAT CONSERVATION.

    Expenses $13,759,836 · Revenue $5,498,815

  • EDUCATIONAL PROGRAMS - THROUGH THE JOSEPH REGENSTEIN, JR. SCHOOL OF THE CHICAGO BOTANIC GARDEN AND A VARIETY OF EDUCATIONAL AND COMMUNITY OUTREACH PROGRAMS, THE GARDEN SEEKS TO BECOME THE NATION'S PREEMINENT TEACHING GARDEN, WITH PROGRAMMING FOR STUDENTS OF ALL AGES, INCLUDING CAMP CBG (FOR AGES 2-12), NATURE PRESCHOOL, AND SCIENCE FIRST, WINDY CITY HARVEST YOUTH FARM, AND COLLEGE FIRST (FOR MIDDLE AND HIGH SCHOOL STUDENTS). COLLEGE STUDENTS AND POST-GRADUATES PARTICIPATE IN VARIOUS INTERN PROGRAMS, SOME IN PARTNERSHIP WITH AREA UNIVERSITIES. FINALLY, HUNDREDS OF CLASSES, WORKSHOPS, SYMPOSIA, AND ELEVEN PROFESSIONAL CERTIFICATE PROGRAMS ARE AVAILABLE THROUGH THE JOSEPH REGENSTEIN, JR. SCHOOL. EACH YEAR APPROXIMATELY 150,000 ARE REACHED THROUGH THESE PROGRAMS.

    Expenses $9,170,768 · Revenue $3,427,538

  • OTHER

    Expenses $1,607,731 · Revenue $122,831

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Michael R Zimmerman

    BOARD CHAIR

    Total calculated
    $0
    Hours/week
    2
  • Alan J Rouse

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Andrew Sinclair

    CHAIR, FINANCE & INVESTMENT

    Total calculated
    $0
    Hours/week
    2
  • Anita M Sarafa

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Anita M Tyson

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Ann Balusek

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Anne Leventry

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Anne S Loucks

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Barbara Malott Kizziah

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Benjamin F Lenhardt Jr

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Bob Probst

    CHAIR, AUDIT

    Total calculated
    $0
    Hours/week
    2
  • Britt M Miller

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Carol A Barnett

    CHAIR, BUILDINGS, GARDENS, AND VISITOR EXPERIENCE

    Total calculated
    $0
    Hours/week
    2
  • Catherine M Waddell

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Christopher E Girgenti

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Christopher Merrill

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Craig Niemann

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Dana Anderson

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Diana S Ferguson

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Diane Vs Levy

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Dora Aalbregtse

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Eileen Figel

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Ernest C Wong

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Ernest W Torain Jr

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2
  • Glena Temple

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2

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

  • 2024
    Revenue
    $68,147,549
    Expenses
    $73,382,562
    Contributions
    $39,376,498
    Grants paid
    $0
  • 2023
    Revenue
    $76,930,745
    Expenses
    $69,918,513
    Contributions
    $54,322,264
    Grants paid
    $0
  • 2022
    Revenue
    $77,057,735
    Expenses
    $60,660,427
    Contributions
    $34,829,423
    Grants paid
    $120,000

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

  • 2024 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2023 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2022 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2021 · 990

    Revenue
    $72,376,611
    Expenses
    $53,561,911
    Assets (EOY)
    $333,124,052
  • 2021 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2020 · 990

    Revenue
    $53,583,619
    Expenses
    $46,241,769
    Assets (EOY)
    $311,583,095
  • 2020 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2019 · 990

    Revenue
    $88,318,689
    Expenses
    $48,907,247
    Assets (EOY)
    $289,912,332
  • 2018 · 990

    Revenue
    $49,317,007
    Expenses
    $47,979,832
    Assets (EOY)
    $249,029,271
  • 2017 · 990

    Revenue
    $49,757,988
    Expenses
    $48,755,048
    Assets (EOY)
    $252,541,559

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

Where these grants went next →

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 2024 return

Declared as related by

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 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.