Pup 'N' Taco (also spelled with a lower case 'n') was a privately owned chain of fast-food restaurants in Southern California; the chain's headquarters were located in Long Beach, California. The business was begun by Russell Wendell in 1956 as a drive-in restaurant that served tacos, hot dogs, and pastrami sandwiches. Russell already owned Big DoNut, a chain of successful doughnut stores in Los Angeles that featured gigantic doughnuts atop a drive-in bakery. The first officially branded Pup 'N' Taco was opened in Pasadena, California in 1965.

The menu consisted of tacos, tostadas, pastrami sandwiches, burgers, several varieties of hot dog (the "pup" in Pup 'N' Taco), and french fries. Beverages included R.C. Cola, root beer and a variety of flavored slushes. In January 1972, there were 50 locations. One year later, there were 62 locations. Russ Wendel Sr. designed many of the buildings.

Ninety-nine stores in California were bought by Taco Bell in 1984 for their prime locations in expensive real estate markets, effectively ending the chain. However, three operations in Albuquerque, New Mexico, were not included in the deal and two existed as Pop 'N' Taco until closing in 2013.