Fiscal year ending 2024. Filed on November 4, 2025.
4100 Illinois Route 53
425 East State Street
Lisle, Illinois 60532
The Morton Arboretum (EIN: 36-1505770) has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2024 IRS Form 990 filing, The Morton Arboretum, a 501(c)(3) charitable organization, reported compensation for 18 out of 561 total employees. Among the employees shown here, the average compensation is $233,347. The highest compensated employee at The Morton Arboretum is Koski Jill with fiscal year 2024 compensation of $631,541.
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Employee compensation
TO COLLECT, STUDY, DISPLAY, AND CONSERVE TREES AND OTHER PLANTS FROM AROUND THE WORLD TO INSPIRE LEARNING, FOSTER ENJOYMENT, BENEFIT COMMUNITIES, ENCOURAGE ACTION, AND ENHANCE THE ENVIRONMENT.
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