The little town I live in in Michigan, Mancelona, has long been known as Mancytucky due to the large influx of Kentuckians when the Antrim Iron Company started growing in the late 1800s. They were bringing in Kentuckians by the box car load to work there.
Yes, our town was built by a lot of Kentucky "immigrants" due to the manufacturing in the late 1800's early 1900's. We had at one time the largest paper mill in the USA, it is currently being demolished. We also had Pillsbury factory which has now been turned into a Hospice facility. Dover elevators and Debold Safe used to also employed alot of people, all are long gone now.
My grandparents came from Owesly County Ky back in the early 40's for work.
Hamilton is or was the largest Ohio city not located on a major interstate or having one going through it.
Due to the building craze of the late 90's and early 2000's, we could be call little Mexico now due to immigrant contruction workers building houses.