It seems like I've been shopping at Walmart all my life.  They are rather ubiquitous here.  They do have more than 11,700 stores.
I've shopped at Walmart a majority of my life too! Though, now that I've moved cities I tend to shop at HEB for most of my groceries, but they don't have other random items that I'll need so I've relied on Amazon to get those things!
Walmart is a little rough these days though.  Most of the stores around here aren't very well maintained and it seems to be deliberate as Walmart tries to cut labor costs even more than they already have