Where is Potomac Maryland? What County is Potomac in

The town of Potomac belongs (from highest to lowest) to the state Maryland and Montgomery County. The town of Potomac covers 68.8 km2, has 44,965 inhabitants (2010 census) and a density of 653.56 inhabitants per km2. The average altitude is 110 m.
The Spanish name is Potomac River.

What is Potomac Maryland known for?
Is Potomac a DC suburb?
Where does Real Housewives of the Potomac take place?
What cities are near Potomac MD?