There are 48 zip codes in Montgomery County, Maryland. The most populated is 20906, located in Silver Spring. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 20906 | 71,560 | Silver Spring |
| 20878 | 65,954 | Gaithersburg |
| 20874 | 61,922 | Germantown |
| 20904 | 56,532 | Silver Spring |
| 20902 | 53,308 | Silver Spring |
| 20850 | 51,072 | Rockville |
| 20854 | 49,320 | Potomac |
| 20852 | 48,379 | Rockville |
| 20910 | 45,072 | Silver Spring |
| 20877 | 38,524 | Gaithersburg |
| 20817 | 37,795 | Bethesda |
| 20901 | 37,207 | Silver Spring |
| 20886 | 34,692 | Montgomery Village |
| 20853 | 31,794 | Rockville |
| 20815 | 31,080 | Chevy Chase |
| 20814 | 30,234 | Bethesda |
| 20879 | 27,489 | Gaithersburg |
| 20871 | 27,420 | Clarksburg |
| 20876 | 26,572 | Germantown |
| 20912 | 25,823 | Takoma Park |
| 20832 | 25,488 | Olney |
| 20903 | 25,324 | Silver Spring |
| 20895 | 19,273 | Kensington |
| 20905 | 17,451 | Silver Spring |
| 20816 | 17,390 | Bethesda |
| 20866 | 16,680 | Burtonsville |
| 20855 | 16,558 | Derwood |
| 20851 | 14,659 | Rockville |
| 20882 | 13,962 | Gaithersburg |
| 20872 | 12,932 | Damascus |
| 20841 | 9,312 | Boyds |
| 20833 | 7,949 | Brookeville |
| 20837 | 6,651 | Poolesville |
| 20861 | 3,031 | Ashton |
| 20860 | 2,279 | Sandy Spring |
| 20842 | 1,927 | Dickerson |
| 20818 | 1,787 | Cabin John |
| 20896 | 840 | Garrett Park |
| 20868 | 630 | Spencerville |
| 20880 | 604 | Washington Grove |
| 20838 | 368 | Barnesville |
| 20812 | 282 | Glen Echo |
| 20862 | 268 | Brinklow |
| 20839 | 161 | Beallsville |
| 20889 | 158 | Bethesda |
| 20899 | 143 | Gaithersburg |
| 20892 | 0 | Bethesda |
| 20894 | 0 | Bethesda |