King County, Washington is named after Martin Luther King.
Well, not always. Just since a couple of years ago. Before that it was known as King County - named after one of the early (and very white) settlers - Rufurd B. King or some-such.
I forget how many millions were spent redoing the logo, stationary, repainting county vehicles, etc.
William Rufus DeVane King, senator from Alabama and Vice President under Franklin Pierce.