| Zip Code | Area Code | County | Centroid | Other Information |
| 21201 | 410 | Baltimore City | (39.2959, -76.6237) | Observes Daylight Savings Time |
| 21202 | 410 | Baltimore City | (39.2969, -76.6094) | Observes Daylight Savings Time |
| 21203 | 410 | Baltimore City | (39.2977, -76.6079) | Observes Daylight Savings Time |
| 21205 | 410 | Baltimore City | (39.3012, -76.5697) | Observes Daylight Savings Time |
| 21206 | 410 | Baltimore City | (39.338, -76.5362) | Observes Daylight Savings Time |
| 21207 | 410 | Baltimore | (39.3238, -76.7143) | Observes Daylight Savings Time |
| 21209 | 410 | Baltimore City | (39.3705, -76.6945) | Observes Daylight Savings Time |
| 21210 | 410 | Baltimore City | (39.3555, -76.6354) | Observes Daylight Savings Time |
| 21211 | 410 | Baltimore City | (39.327, -76.6383) | Observes Daylight Savings Time |
| 21212 | 410 | Baltimore City | (39.3678, -76.6186) | Observes Daylight Savings Time |
| 21213 | 410 | Baltimore City | (39.3167, -76.5785) | Observes Daylight Savings Time |
| 21214 | 410 | Baltimore City | (39.3501, -76.5627) | Observes Daylight Savings Time |
| 21215 | 410 | Baltimore City | (39.3431, -76.6847) | Observes Daylight Savings Time |
| 21216 | 410 | Baltimore City | (39.3103, -76.6737) | Observes Daylight Savings Time |
| 21217 | 410 | Baltimore City | (39.3075, -76.6378) | Observes Daylight Savings Time |
| 21218 | 410 | Baltimore City | (39.3284, -76.6021) | Observes Daylight Savings Time |
| 21219 | 410 | Baltimore | (39.2341, -76.4532) | Observes Daylight Savings Time |
| 21220 | 410 | Baltimore | (39.34, -76.4075) | Observes Daylight Savings Time |
| 21221 | 410 | Baltimore | (39.2948, -76.4365) | Observes Daylight Savings Time |
| 21222 | 410 | Baltimore | (39.2627, -76.4948) | Observes Daylight Savings Time |
| 21223 | 410 | Baltimore City | (39.2803, -76.6505) | Observes Daylight Savings Time |
| 21224 | 410 | Baltimore City | (39.2807, -76.538) | Observes Daylight Savings Time |
| 21225 | 410 | Anne Arundel | (39.2304, -76.6174) | Observes Daylight Savings Time |
| 21226 | 410 | Anne Arundel | (39.2035, -76.5586) | Observes Daylight Savings Time |
| 21227 | 410 | Baltimore | (39.2525, -76.6964) | Observes Daylight Savings Time |
| 21229 | 410 | Baltimore City | (39.2813, -76.6951) | Observes Daylight Savings Time |
| 21230 | 410 | Baltimore City | (39.2657, -76.6232) | Observes Daylight Savings Time |
| 21231 | 410 | Baltimore City | (39.289, -76.5924) | Observes Daylight Savings Time |
| 21233 | 410 | Baltimore City | (39.2914, -76.6051) | Observes Daylight Savings Time |
| 21234 | 410 | Baltimore | (39.3922, -76.5314) | Observes Daylight Savings Time |
| 21235 | 410 | Baltimore City | (39.3109, -76.7267) | Observes Daylight Savings Time |
| 21236 | 410 | Baltimore | (39.3875, -76.4954) | Observes Daylight Savings Time |
| 21237 | 410 | Baltimore | (39.3403, -76.5051) | Observes Daylight Savings Time |
| 21239 | 410 | Baltimore City | (39.3642, -76.5881) | Observes Daylight Savings Time |
| 21240 | 410 | Anne Arundel | (39.1783, -76.6643) | Observes Daylight Savings Time |
| 21241 | 410 | Baltimore City | (39.3065, -76.7342) | Observes Daylight Savings Time |
| 21244 | 410 | Baltimore | (39.337, -76.764) | Observes Daylight Savings Time |
| 21250 | 410 | Baltimore | (39.2546, -76.7092) | Observes Daylight Savings Time |
| 21251 | 410 | Baltimore | (39.3414, -76.5836) | Observes Daylight Savings Time |
| 21252 | 410 | Baltimore | (39.3933, -76.6112) | Observes Daylight Savings Time |
| 21263 | 410 | Baltimore City | (39.2921, -76.6125) | Observes Daylight Savings Time |
| 21264 | 410 | Baltimore City | (39.2949, -76.6231) | Observes Daylight Savings Time |
| 21265 | 410 | Baltimore City | (39.2881, -76.6189) | Observes Daylight Savings Time |
| 21268 | 410 | Baltimore City | (39.2473, -76.65) | Observes Daylight Savings Time |
| 21270 | 410 | Baltimore City | (39.3582, -76.7057) | Observes Daylight Savings Time |
| 21273 | 410 | Baltimore City | (39.289, -76.6137) | Observes Daylight Savings Time |
| 21274 | 410 | Baltimore City | (39.2921, -76.6125) | Observes Daylight Savings Time |
| 21275 | 410 | Baltimore City | (39.2901, -76.6133) | Observes Daylight Savings Time |
| 21278 | 410 | Baltimore City | (39.3193, -76.6161) | Observes Daylight Savings Time |
| 21279 | 410 | Baltimore City | (39.2973, -76.6082) | Observes Daylight Savings Time |
| 21280 | 410 | Baltimore City | (39.2973, -76.6082) | Observes Daylight Savings Time |
| 21281 | 410 | Baltimore City | (39.2885, -76.5697) | Observes Daylight Savings Time |
| 21282 | 410 | Baltimore | (39.387, -76.7238) | Observes Daylight Savings Time |
| 21283 | 410 | Baltimore City | (39.2914, -76.6051) | Observes Daylight Savings Time |
| 21284 | 410 | Baltimore | (39.4013, -76.5998) | Observes Daylight Savings Time |
| 21287 | 410 | Baltimore City | (39.3021, -76.5621) | Observes Daylight Savings Time |
| 21288 | 410 | Baltimore City | (39.2914, -76.6051) | Observes Daylight Savings Time |
| 21289 | 410 | Baltimore City | (39.3109, -76.7267) | Observes Daylight Savings Time |
| 21290 | 410 | Baltimore City | (39.2926, -76.6235) | Observes Daylight Savings Time |
| 21297 | 410 | Baltimore City | (39.2976, -76.608) | Observes Daylight Savings Time |
| 21298 | 410 | Baltimore City | (39.3008, -76.6106) | Observes Daylight Savings Time |