Contact Us

General Inquiries

Before contacting us, please review our Frequently Asked Questions page.

For the quickest response, it is recommended that you contact staff by email – instead of by phone or mail.

For all other inquiries, please contact (216) 831-4134.

Our mailing address:

Attn: William J. and Dorothy K. O’Neill Foundation
PO Box 44040
Cleveland, OH 44144

Help Us Go Paperless!

We’re trying to be kinder to our environment. Please forward all annual reports, newsletters, and other brochures to us electronically at

For Our Current Grantees

We invite you to learn about our new grantee portal, communication guidelines, and reporting requirements.

Learn more >

Communication & Media Guidelines

When in doubt, please don’t hesitate to contact Marlene Corrado.

Review the guidelines >