Lewis and Clark County, MT ZIP codes
Lewis and Clark County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Lewis and Clark County ZIP codes
The ZIP codes of Lewis and Clark County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Lewis and Clark County in numbers
About 73,464 people live in Lewis and Clark County, in 31,215 households, the 6th most populous of Montana's 56 counties. The median household income is $78,237 a year, 8% above the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $393,500 (5% above the Montana median), and median gross rent is $1,102 a month. The median age is 41.8; 43.0% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 18 minutes.
| Population | 73,464 |
|---|---|
| Households | 31,215 |
| Median age | 41.8 |
| Median household income | $78,237 |
| Median home value | $393,500 |
| Median gross rent | $1,102 |
| Bachelor's degree or higher | 43.0% |
| Mean commute | 18.3 min |
| Population density | 21 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Lewis and Clark County
| Town | ZIP codes | Population |
|---|---|---|
| Helena | 8 | 33,639 |
| East Helena | 1 | 1,702 |
| Lincoln | 1 | 908 |
| Augusta | 1 | 165 |
| Marysville | 1 | 160 |
| Fort Harrison | 1 | 32 |
| Canyon Creek | 1 | 27 |
| Wolf Creek | 1 | 12 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Lewis and Clark County.
Not sure you are in Lewis and Clark County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Lewis and Clark County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
59410 | Augusta , MT | Standard | 520 | $42,321 | $259,400 |
59601 | Helena , MT | Standard | 31,728 | $72,290 | $386,500 |
59602 | Helena , MT | Standard | 30,754 | $92,985 | $408,600 |
59604 | Helena , MT | No street area | — | — | — |
59620 | Helena , MT | No street area | — | — | — |
59623 | Helena , MT | Standard | 0 | — | — |
59624 | Helena , MT | No street area | — | — | — |
59625 | Helena , MT | Standard | 663 | — | — |
59626 | Helena , MT | No street area | — | — | — |
59633 | Canyon Creek , MT | Standard | 272 | — | $413,600 |
59635 | East Helena , MT | Standard | 8,292 | $83,740 | $395,600 |
59636 | Fort Harrison , MT | Standard | 32 | — | — |
59639 | Lincoln , MT | Standard | 1,021 | $57,778 | $371,700 |
59640 | Marysville , MT | Standard | 160 | $99,167 | $287,500 |
59648 | Wolf Creek , MT | Standard | 486 | $65,750 | $263,600 |
Cite this page
zipcodes.pro. “Lewis and Clark County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/lewis-and-clark
Underlying data is public domain or openly licensed — sources, vintages and licences.