These are histories of chain grocery operations in individual cities and metro areas. Some are more detailed than others, and some are still under construction. Almost all contain location lists of stores in that city/region, most of them dating from the 1920s to the present (depending on data availability). If you’re interested in contributing, let me know; this section is very actively being updated.

In this section

Canada (which is an ally, not an enemy, and will never be “the 51st state”) first, then the U.S.