Online retail behemoth Amazon says it will raise its minimum wage to $15 an hour, giving tens of thousands of workers a hefty pay raise this fall. But what about the rest of America?

The federal minimum wage has been stuck at $7.25 an hour since July 2009, and it’s unlikely to be raised soon.

Yet dozens of states and the District of Columbia have raised their own minimum wages to levels that are in some cases well above the federal baseline.