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Compensation 990 is an independent service that uses public IRS Form 990 filings as its source data. We clean and standardize this information, but the original filings may contain errors or omissions. Years on this site refer to the organization’s fiscal year end date on the filing.

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Employees Cleveland Botanical Garden Jill Koski

Jill Koski

Officer

President&Ceo(Through 10/22) at Cleveland Botanical Garden

Fiscal year ended September 30, 2023. Published on January 25, 2026.

$433,940
2023

Total compensation

Jill Koski has been listed as an employee of Cleveland Botanical Garden in Form 990 filings since fiscal year 2018. Total compensation for Jill Koski has increased by 886% from 2018 to 2023.

Annual compensation details

$433,940
+36.6%
President&Ceo(Through 10/22)
2023
$402k related
40 hrs/wk
$32k other
--
$317,570
-5.2%
President and Chief Executive Officer
2022
$286k related
40 hrs/wk
$32k other
--

Total compensation by year

Compare the compensation of Jill Koski to:

2023

Other employees at Cleveland Botanical Garden

Kathleen Heflin
Interim Co-Pres.&Ceo and CFO
$247,342
$0 from org$234,353 from related$12,989 other
Joel Alpern
Interim Co-Pres.&Ceo
$190,497
$167,497 from orgNo related comp$23,000 other
Margaret Butzow
Secretary
$82,414
$73,120 from orgNo related comp$9,294 other
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Revisions to this profile

January 25, 2026:
2023 Cleveland Botanical Garden 990 published
January 25, 2026:
2022 Cleveland Botanical Garden 990 published
January 25, 2026:
2021 Cleveland Botanical Garden 990 published

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Pres.&Ceo(As of 9/17)
2018
$40k related
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--

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