ZIP codes in Newton County
13 ZIPs touch Newton County, Indiana. The blue dashed line is the county border; orange ZIPs reach into it.
13
ZIP codes
6
cross the county line
36,947
people in these ZIPs
92
counties in IN
Most people
Newton County ZIP list
More counties in Indiana
- Marshall County15
- Martin County7
- Miami County15
- Monroe County23
- Montgomery County17
- Morgan County14
- Noble County18
- Ohio County5
- Orange County11
- Owen County14
- Parke County14
- Perry County14
Questions people actually ask
How many ZIP codes are in Newton County, Indiana?
13 ZIP codes reach into Newton County, including 1 PO Box or single-address ZIPs placed by the town they serve. 6 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Newton County has the most people?
46310 (Demotte) has about 14,077 residents, the most of any ZIP touching Newton County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Newton 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 Newton 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