ZIP codes in Silver Bow County
10 ZIPs touch Silver Bow County, Montana. The blue dashed line is the county border; orange ZIPs reach into it.
10
ZIP codes
5
cross the county line
48,704
people in these ZIPs
56
counties in MT
Most people
Silver Bow County ZIP list
More counties in Montana
- Ravalli County10
- Richland County9
- Roosevelt County10
- Rosebud County12
- Sanders County11
- Sheridan County11
- Stillwater County10
- Sweet Grass County7
- Teton County12
- Toole County10
- Treasure County3
- Valley County14
Questions people actually ask
How many ZIP codes are in Silver Bow County, Montana?
10 ZIP codes reach into Silver Bow County, including 3 PO Box or single-address ZIPs placed by the town they serve. 5 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Silver Bow County has the most people?
59701 (Butte) has about 34,232 residents, the most of any ZIP touching Silver Bow County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Silver Bow County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Silver Bow County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
Keep exploring
Updated 2026-11-10 · Where the data comes from