On Louisville - The "balance" population used by the Census places them at 30th (612K). If you use the "actual" population caused by the city-county merger - not a state law change - then Louisville is at 18th (760K). By MSA, Louisville is 43 (1.2M) and Huntington is 144 (366K). By CSA, Louisville is at 35 (1.5M) and Huntington is at 67 (703K).
Looking at these numbers makes it clear that the media markets - DMAs - are interesting, since Louisville is listed at 49 (653K, 86% real population, 58% of MSA, 44% of CSA) compared to Huntington at 67 (434K, 886% population, 119% of MSA, 62% of CSA). Looking at a map, you can see that Huntington's DMA combines the Huntington and Charleston areas, and is geographically twice as large as Louisville's.
If you were to combine Louisville and Lexington's DMAs (similar distance between them compared to Huntington/Charleston, would create similar geographic size), you'll find a combined DMA of 1.156M (152% of real population, 104% of MSA, 96% of MSA, 77% of CSA), slightly larger than Pittsburgh, ranked 23. and much closer to a real estimate of Louisville's true market area.
This is why going by DMAs is ridiculous. They're only determined by where local stations are broadcast to. Louisville's DMA is shrunk significantly because of the proximity of Cincinnati (100 miles), and Lexington (78 miles), and even Indianapolis (115 miles) - if a county receives stations from more than one city, it will be included in whichever city's DMA it watches TV from more.
On a final note, although the entire state of KY bleeds blue, just about everyone I've met who keeps up with sports (after growing up there) follows Louisville to a degree, and likes them in all but one game a year. Even here in Ashland, right in the middle of Huntington's market area and three hours from Louisville, UL is just as well known and followed as MU.
tl;dr - Louisville is a more major city than SamC wants you to think, and DMAs are not accurate market representation outside of the local news.