ST. PETERSBURG, Fla. — Oct. 4 is National Taco Day, and national and regional taco chains are marking this taco lovers' fiesta with free tacos or specials.

According to the website, NationalTacoDay.com, Americans ate more than 4.5 billion tacos last year. The site estimates that's 490,000 miles of tacos and 775 million pounds.

National Taco Day freebies and deals

The following offers are available Friday unless otherwise noted. Always check with your closest location as offers and participation can vary. 

Applebee’s: At locations operated by Doherty Enterprises in Florida, Georgia, New Jersey and New York, the Chicken Wonton Taco appetizer will be $1 Friday for dine-in only.

California TortillaSay "Taco-berfest" when placing an order Friday to receive a free taco with purchase. Get free delivery for a taco bar catering order when you mention the "Taco-berfest Catering" deal.

Chart HouseThe restaurant offers a "hybrid holiday special" Friday in the bar and lounge. Choose from a shrimp, fish or prime rib taco paired with a Ketel One 'tini for $10.

Chipotle Mexican GrillThough there's not a specific Taco Day deal, sign up for Chipotle Rewards at www.chipotle.com/rewards, and after you make your first $5 purchase, get a free chips and guac reward.

Del TacoThe chain has two separate offers available with the Del App Friday. Get a free Del Taco with any purchase through the app with a coupon, and get the plant-based Beyond Taco or Beyond Avocado Taco free with any app purchase. Download the app at www.deltaco.com/app.

Hurricane Grill & WingsBuy one taco and two drinks Friday, get one free taco.

Jack in the BoxGet a free taco with any purchase Friday if you're signed up for the chain's e-club. Sign up at www.jackinthebox.com/offers.

Margaritas Mexican RestaurantGet one free beef or chicken taco Friday when dining in and requesting the Taco Day deal. Limit one free taco per customer, while supplies last. Through Oct. 31, the chain will have the Taco Gigante, a 2-pound, foot-long taco with a challenge. Finish the Gigante to win free tacos for a year.

On The BorderGet Endless Tacos for either $8.99 or $9.99 depending on your location Friday. For $2 more, get Southwest Chicken or Brisket Tacos. Check your location's pricing on the events page at www.ontheborder.com.

Qdoba Mexican EatsRewards members get double points Friday. Sign up for the free loyalty program at www.qdoba.com/rewards.

Rubio’s Coastal GrillGet any taco on the menu free with the purchase of a beverage Friday and a coupon available at www.rubios.com/coupons/national-taco-day.

Taco BellThe chain has a special "National Taco Day gift set" Friday. For $5, get four tacos – two Crunchy Tacos and two Nacho Cheese Doritos Locos Tacos, and you can order a gift card to cover the set at www.nationaltacodaygiftset.comThrough Oct. 17, get a free bean burrito with mobile orders.

Tijuana FlatsThe chain is celebrating National Taco Day for three days. From Friday through Sunday, get two tacos, chips and a drink for $5.99. Fish and steak tacos are $1 extra. With the special, get a Mexican beer instead of a drink for $2 more. 

More deals: Local restaurants and smaller chains in your area may offer special deals as well. Check their social media accounts for deal announcements.

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