National Coffee Day is Sunday, Sept. 29. Celebrate with these deals in-store and online.

Check back for updates, and if you know of other deals, leave a comment!

Dunkin Donuts: Get a free small hot or iced Dunkin’ Donuts coffee at participating restaurants. The offer is available and redeemable only on National Coffee Day through the “My Offers” tab of the Dunkin’ Mobile App for both iPhone and Android mobile devices.

Einstein Bros Bagels: Join the eclub and get a coupon for a BOGO free on coffee beverages good for Sept. 27 - Sept. 29.

Krispy Kreme: Get a free 12oz cup of hot coffee at participating Krispy Kreme locations. No purchase necessary. You can also get any 12 oz mocha, latte, or iced coffee for $1 at participating Krispy Kreme locations. Click the link above to view Atlanta area locations and to find more information.  

Kangaroo Express: Get a 12 oz Bean Street coffee for one penny from 8 a.m.- 12 p.m.

Starbucks:  Starbucks celebrates the birthplace of coffee: Ethiopia. Customers get a free taste of Ethiopia, Starbucks newest whole-bean coffee -- a single-origin, medium roast coffee with notes of sweet citrus and peppery spice. If you purchase a 1-lb bag of the stuff, you will get a free Ethiopia-inspired commemorative tasting cup. 

Online offers:

Maui Wowi Hawaiian: Take 45% off all online coffee purchases on National Coffee Day with promo code ALOHACOFFEE at checkout on shop.mauiwowi.com.The discount applies to all gourmet Hawaiian coffees including the 100 percent Kona coffee, Maui Mountain Roast  and flavored coffees such as Chocolate Macadamia Nut and Toasted Coconut.

USA Coffee Company:  Get a free eight-ounce (8oz) bag of Hawaiian grown Union Roast coffee (a $11.95 value) with any coffee purchase made on National Coffee Day. Visit USACoffeeCompany.com and enter code “COFFEE DAY” at checkout.