20859 is zip code located in Potomac, Maryland. The population is , making 20859 the 2nd largest zipcode in Potomac.
There are 0 public schools in 20859 with an average Homefacts rating of NA. , and there are 0 registered sex offenders residing in the zip code 20859. Unemployment in 20859 is moderate.
Zip codes within Potomac include 20854.