There are 44 zip codes in Baltimore County, Maryland. The most populated is 21234, located in Parkville. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 21234 | 66,095 | Parkville |
| 21222 | 60,013 | Dundalk |
| 21117 | 58,516 | Owings Mills |
| 21207 | 51,765 | Gwynn Oak |
| 21228 | 50,268 | Catonsville |
| 21221 | 43,822 | Essex |
| 21220 | 42,652 | Middle River |
| 21244 | 39,501 | Windsor Mill |
| 21093 | 38,961 | Lutherville Timonium |
| 21236 | 38,632 | Nottingham |
| 21208 | 37,319 | Pikesville |
| 21227 | 35,052 | Halethorpe |
| 21136 | 35,038 | Reisterstown |
| 21133 | 32,070 | Randallstown |
| 21237 | 30,983 | Rosedale |
| 21209 | 29,960 | Baltimore |
| 21030 | 25,133 | Cockeysville |
| 21286 | 21,142 | Towson |
| 21204 | 20,188 | Towson |
| 21128 | 15,934 | Perry Hall |
| 21219 | 9,605 | Sparrows Point |
| 21131 | 7,722 | Phoenix |
| 21120 | 7,319 | Parkton |
| 21163 | 7,222 | Woodstock |
| 21152 | 6,517 | Sparks Glencoe |
| 21087 | 5,597 | Kingsville |
| 21013 | 5,382 | Baldwin |
| 21111 | 4,838 | Monkton |
| 21057 | 4,530 | Glen Arm |
| 21252 | 4,456 | Towson |
| 21162 | 4,322 | White Marsh |
| 21155 | 3,063 | Upperco |
| 21053 | 3,051 | Freeland |
| 21250 | 2,959 | Baltimore |
| 21082 | 694 | Hydes |
| 21153 | 676 | Stevenson |
| 21071 | 526 | Glyndon |
| 21052 | 438 | Fort Howard |
| 21156 | 362 | Upper Falls |
| 21051 | 113 | Fork |
| 21023 | 68 | Butler |
| 21105 | 40 | Maryland Line |
| 21031 | 26 | Hunt Valley |
| 21285 | 10 | Towson |