Jack in the Box first opened in San Diego, California in 1951. A commonly cited address for the original location is 6270 El Cajon Boulevard.

Quick Scoop

  • Founder: Robert O. Peterson.
  • First opening date: February 21, 1951.
  • City: San Diego.

One small note: some sources describe the first restaurant a little differently, but the most consistent history points to San Diego, California as the chain’s first home.

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Fact Answer
First location San Diego, California
Opening date February 21, 1951
Founder Robert O. Peterson
TL;DR: Jack in the Box started in **San Diego** in **1951**.