Gaithersburg, MD ZIP Codes

Total ZIPs

135,332

Total Population

ZIP Codes in Gaithersburg, MD

ZIP Code	Population	Density	Timezone
20878	62,446	1,100	America/New_York
20877	34,321	2,296	America/New_York
20879	24,360	1,226	America/New_York
20882	14,063	141	America/New_York
20899	142	694	America/New_York

All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.