I saw this article today-- I was only slightly surprised that the Sox had NO counties, even in the South Side of Chicago. Maybe it is their terrible performance over the past 10 years, maybe it is a dwindling fanbase because of team irrelevance and the Cubs doing so well, or maybe it is how they did the stats (not many Sox fans looking for tickets on SeatGeek over the past few years).
This is what MLB fandom looks like across the country in 2019 -- Business Insider