COVID-19 UPDATE: Yellowsack is fully operational ⟶ Order bags and pickups ONLINE ⟶ Next day pickup Mon-Sat

We are here to help you!

We read and respond to every customer inquiry.

If you’re wondering about an order, our products or our website, use our chat or shoot us an email at or check out the Frequently Asked Questions - the answer might be there already.

For everything else use the form below, and we will come back to you as soon as we can. :-)

Yellowsack Inc.

Postal address
400 Concar Dr
San Mateo, CA 94402

Phone: 1-833-3YELLOW (935569)

Customer support opening hours
Mon - Fri, 8am - 4pm
Saturday, 10am - 2pm
Sunday, closed