| City: | Helena, Montana |
| County: | Lewis And Clark County |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 7:00:00 AM |
| Population: | No Population Data |
| Area Code: | 406 |
| Classification: | PO Box |
| Coordinates: | 46.5925, -112.0355 |
| Quick Link: |
The single street record, N Harris ST with 172 unit-based entries, likely represents the post office's own address rather than residential carrier routes. This setup is common in cities where the main post office operates a separate PO Box ZIP while carrier delivery runs through the primary city ZIP. Residents choose between getting mail at home or renting a box for convenience and security.
The single street entry represents the post office facility address rather than a residential delivery route, typical for dedicated PO Box ZIPs.
ZIP Code 59604 supports both business and residential activity. According to the Business Census (2024), there are 31 business establishments, employing about 285 people with an annual payroll of $21,027,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 6,960Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 31Source: CBP |
| 1st Quarter Payroll: | $5,627,000Source: CBP |
| Annual Payroll: | $21,027,000Source: CBP |
| # of Employees: | 285Source: CBP |
ZIP Code 59604 is located in Lewis And Clark County, Montana, within the Helena, MT Metropolitan Statistical Area (CBSA 25740) and Montana's 2nd Congressional District. This Metro area has a population of 74,801 people, about 0.00% of whom live in ZIP Code 59604. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Helena, MTSource: Census |
| CBSA Number: | 25740Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 74,801Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 0 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 3035600Source: Census |
| Place Name: | Helena city; MontanaSource: Census |
We could not locate which school district 59604 belongs to, but we will update this once new district data is released. There are 0 public schools with a nearby mailing address, but we have located 5 public schools nearby. There are however 1 private school(s). It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.