What is the oldest supermarket in the us?

The oldest supermarket in the United States is believed to be King Kullen, which opened in 1930 in Queens, New York. Founded by Michael J. Cullen, it introduced the concept of self-service grocery shopping, allowing customers to browse and select their items rather than relying on clerks. King Kullen paved the way for the modern supermarket model, revolutionizing the grocery shopping experience.