ZIP Code 59403 is located in Great Falls Montana. 59403 is entirely within Cascade County. Regionally, 59403 is located in the Great Falls Area.
| ZIP Code Name | Great Falls |
| Primary County | Cascade County |
| ZIP Code Type | PO Box |
| Current Time | MST |
| Coordinates | 47.50645447,-111.30383301 |
| Adjacent ZIP Codes | |
| Region | Great Falls Area |
| Metropolitan/Micropolitan Stat Area | Great Falls, MT |
| Time Zone | Mountain Standard Time |
| IANA Timezone | America/Denver |
| School Districts in 59403 | |
| Elementary Schools in 59403 | |
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| High Schools in 59403 |