Flag of Appaloosa:

The red symbolizes the name, Appa-loosa. And the yellow star symbolizes the Western cowboy aesthetic of the region. Yellow also symbolizes the sun, and therefore, Celestia. The red also symbolizes the Apple family.   
 

I hope you all like it! I made this my first entry because I don’t think Appaloosa got enough love in the show. See, I like Appaloosa, because it kind of reminds me of where I’m growing up.