Cincinnati
1. Reds
2. Bearcats
3. Xavier
4. Moeller High School
5. Bengals
Yeah I know we were talking professional teams here, but that's how far down the line they are right now.
You are absolutely, positively full of it, and you know it. I live closer to there than you do, so I am going to give a more qualified answer. Just listen to sports talk radio up there, and you will find where the interest lies:
1. Bengals
2. Reds
3. UC (basketball only)
4. Xavier
5. Kentucky basketball
Now I'm pretty much talking about passion level, not number of people who are fans of the team. Otherwise, the Reds would be on top.
The Reds are trying (and failing) to hang on to the tradition that Cincinnati is a baseball town. Sports talk show host and Cincinnati Enquirer columnist Paul Daugherty has said several times that the Bengals are more popular than the Reds in Cincinnati (over the airwaves of the Reds' flagship station), and he's right. This observation was also raised by a writer in Cincinnati Magazine two years ago (don't remember the name).
There is a passion elicited by the Bengals in fans, positive and negative, that the Reds just cannot match. You can go through a whole Reds season, and pretty much be able to expect a fairly even-keel response from their fans (one of which am I), whether they win or lose. The Reds are looked upon very positively, but they do not do well at the gate. However, if the Bengals are having a bad season, the level of ire seems to be raised (at least on the radio), until the fans realize that getting upset when Mike Brown is your owner is a waste of time. Similarly, when the Bengals are winning, the city is practically on fire.
All that said, outside of Cincinnati itself, the Bengals have not been able to get as much of a stronghold in the surrounding region. The Reds will probably always be more popular in places like Louisville and Columbus.