For the last 30 years, the traditional supermarket industry has shrunk to a handful of big-name grocers, writes Kevin Schaul and Jaclyn Peiser for The Washington Post.

Walmart, Kroger, Aldi (Süd) and Albertsons own a third of all U.S. grocery store locations, according to a Washington Post analysis of OpenStreetMap location data.

And a federal judge is deciding whether Kroger and Albertson can merge, making it the biggest supermarket union in U.S. history.

In Delaware County, Albertsons still dominates with its ACME stores, making up 21 percent of supermarkets in the county.

Ahold Delhaize, a Dutch company, is next with its Giant Food stores, maintaining 14 percent of the county’s supermarkets.

Aldi, ShopRite and Walmart each have a 7 percent share of supermarkets.

Amazon, with its Whole Foods Market and Amazon Fresh, control about 5 percent of stores, along with Save-A-Lot and Target, each with 5 percent.

Costco accounted for 9 precent of the U.S. grocery market in 2023, according to Solomon Partners.

Amazon was responsible for 6 percent of all grocery sales in the country last year.

In 2023, Walmart, Kroger, and Costco were responsible for half of the $1 trillion in U.S. grocery sales.

Read more about the concentration of grocery store chains in The Washington Post.

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