Thornton Creek Alliance is a grassroots, non-profit, 501(c)(3) organization that depends on donations and membership fees to support its mission to restore an ecological balance to the Thornton Creek Watershed. We welcome donations of any amount and donations are tax deductable.

How to Donate


Donate with PayPal

Donating with PayPal allows you to pay with credit card, debit card, or your PayPal account, if you have one. You do not need a PayPal account to pay with PayPal; just click on the button below, fill in a donation amount and follow PayPal’s directions. On PayPal’s “review” page, just before final checkout, you can click on a link that gives you the option of filling a text box to let us know if your donation is in honor of or a memorial for a special person.


Donate by Mail

Send a check payable to “Thornton Creek Alliance” to:

Thornton Creek Alliance
P.O. Box 25690
Seattle, WA 98165-1190


Matching Donations

Does your employer match charitable gifts? Please fill out their paperwork and provide even more support to Thornton Creek Alliance.

We thank you for making a difference to Thornton Creek Alliance!