Annapolis, MD
Find the Annapolis Free Little Art Gallery at 801 Chase Street, North Entrance of Maryland Hall.
https://www.instagram.com/annapolisfreelittleartgallery
Greenbelt, MD
Gallery Nineteen is Greenbelt, Maryland’s FLAG.
https://www.instagram.com/flagallerynineteen
Columbia, MD
Free Little Art Gallery Columbia
https://www.instagram.com/flag_columbia_md

Potomac, MD
FLAG Potomac
Can be found on 11819 Smoketree Road, Potomac MD 20854 and on Instagram https://www.instagram.com/flag_potomac
And yes, they accept art by mail, address it to Francesca Furchtgott.

Takoma Park, MD
Free Little Art Gallery
Find it along Maple Avenue near the intersection with Lincoln Avenue, near the bus station.
Artist Tina Hudak writes on her blog that the FLAG is painted with Ethiopian motifs, to honor local residents.
This one is run by the city, read about their FLAG on the city website:
https://takomaparkmd.gov/newsletter/make-art-or-take-art-at-the-free-little-art-gallery
and follow them on Instagram: https://www.instagram.com/takomaparkmd