20620 is zip code located in Callaway, Maryland. The population is 1,586, making 20620 the largest zipcode in Callaway and the 8th largest in St. Marys County.
There are 0 public schools in 20620 with an average Homefacts rating of NA. , and there are 1 registered sex offenders residing in the zip code 20620. Unemployment in 20620 is moderate.