Well I have to take issue with that. In Montgomery County, if you go to the outer reaches, sure, there are Oriole fans. Anywhere within 15 miles of the beltway, mostly Nats. I'd guess the same for PG except I spend as little time in PG as possible.
PG is backwards as hell due to:
1. College Park - UMD is full of jackass Orioles fans
2. The Bowie Baysox
3. A general apathy toward baseball
As someone who lived in or near Bowie until just a few years ago, I took many near-empty blue line trains from RFK to Largo, and then many near-empty green line trains from Navy Yard to Suitland.
Dickheads like Boswell, Loverro, Bennett Williams, and Angelos really did a number on the state of Maryland, but here's to hoping that will start to change if the Nats can keep up their relative success and the Orioles keep up their level of play in 2017.