Postal reference / United States
59623Helena, Montana
ZIP code 59623 is a United States postal code for Helena, Montana. Its county association is Lewis and Clark County. The map reference point is at 46.5901, -112.0402.
- State / territory
- Montana
- Recorded place name
- Helena
- County association
- Lewis and Clark
- Estimated coordinate
- 46.5901, -112.0402
View on OpenStreetMap - ZIP prefix
- 596 · 24 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 0.004 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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Browse the other 403 ZIP codes recorded for Montana, sorted by code with place and county.
Montana directoryOther ZIP codes in Helena, MT
Helena has 8 ZIP codes in the reference dataset.
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 59620 | Helena | MT | Lewis and Clark | 0.3 |
| 59624 | Helena | MT | Lewis and Clark | 0.3 |
| 59626 | Helena | MT | Lewis and Clark | 0.3 |
| 59625 | Helena | MT | Lewis and Clark | 0.8 |
| 59601 | Helena | MT | Lewis and Clark | 1.8 |
| 59636 | Fort Harrison | MT | Lewis and Clark | 3.9 |
| 59604 | Helena | MT | Lewis and Clark | 6.3 |
| 59635 | East Helena | MT | Lewis and Clark | 6.4 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
Verify a mailing address
For mailing, confirm the complete street or PO Box address with USPS. A place record does not confirm delivery eligibility or the ZIP+4 extension.
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