Updated Nov 3, 2026
Private foundations based in Grayslake, Illinois
3 grantmaking foundations headquartered in Grayslake, Illinois, holding $107M in assets. Ranked by grants paid in their latest 990-PF; 2 on this page say they accept applications. For foundations ranked by where their grants went, see local funders.
| Foundation | Grants paid | Median grant | Accepts applications | Assets |
|---|---|---|---|---|
| Healthcare Foundation of Northern Lake Countysince 2007 | $2.3M43 grants · 2023 | $45K | Yes | $67M |
| Alonzo Mather Foundation Fund Trustsince 1954 | $2.0M1 grants · 2024 | $2.0M | Preselected only | $32M |
| Esper a Petersen Foundationsince 1961 | $760K41 grants · 2025 | $5,000 | Yes | $7.0M |
Sources: IRS Business Master File (assets), ProPublica Nonprofit Explorer and IRS 990-PF e-file (grants paid, application policy). "Accepts applications" reflects the foundation's own Part XV checkbox.
Open grant programs in Illinois
All 2| Deadline | Grant | Funder | Award ceiling |
|---|---|---|---|
| Rollingno deadline | Illinois Arts Council Agency — Organizational GrantsStateIllinois Arts Council Agency | Illinois Arts Council Agency | Not listed |
| Rollingno deadline | Illinois Humanities — Humanities GrantsStateIllinois Humanities | Illinois Humanities | Not listed |
Common questions
How many private foundations are based in Grayslake, Illinois?
Our directory lists 3 private grantmaking foundations in Grayslake, Illinois with at least $1 million in assets, holding a combined $107M. The data comes from the IRS Exempt Organizations Business Master File and Form 990-PF.
How do I get a grant from a private foundation?
Start with foundations that already fund organizations like yours nearby. Read the grantee list on each profile, check whether the foundation accepts applications (it says so on its 990-PF), and lead with a short letter of inquiry. Many family foundations fund only organizations they already know; an introduction through a shared grantee or board member works better than a cold proposal.
Can you help us approach foundations?
Yes. Our grant writers research foundation prospects, write letters of inquiry, and build a foundation fundraising plan. Request a free consultation.