North Potomac zip code
Zip code in North Potomac, MD
The location North Potomac belongs to Montgomery County, state of Maryland. North Potomac has been assigned with the zip code 20878.The location name North Potomac is listed as acceptable by the US Postal Service so it can be used in your mailings just fine. You can also use any of the following names: Darnestown, N Potomac, No Potomac, North Potomac.