In-N-Out Burger | 61,337 followers on LinkedIn. In-N-Out Burger was founded in 1948 by Harry and Esther Snyder in Baldwin Park, California, and remains privately owned and operated. Under the direction of the Snyder family, the company has opened restaurants throughout California, Nevada, Arizona, Utah, Texas, Oregon, Colorado, and Idaho. In-N-Out Burger’s menu has remained the same since 1948, and we have maintained a simple philosophy – serve only the highest quality product, prepare it in a clean and sparkling environment, and serve it in a warm and friendly manner.