ZIP codes in Newton County
17 ZIPs touch Newton County, Missouri. The blue dashed line is the county border; orange ZIPs reach into it.
17
ZIP codes
12
cross the county line
95,752
people in these ZIPs
115
counties in MO
Most people
Newton County ZIP list
More counties in Missouri
- Mississippi County7
- Moniteau County15
- Monroe County16
- Montgomery County12
- Morgan County16
- New Madrid County17
- Nodaway County18
- Oregon County12
- Osage County16
- Ozark County21
- Pemiscot County14
- Perry County10
Questions people actually ask
How many ZIP codes are in Newton County, Missouri?
17 ZIP codes reach into Newton County, including 2 PO Box or single-address ZIPs placed by the town they serve. 12 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Newton County has the most people?
64804 (Joplin) has about 37,016 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.
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Updated 2026-11-10 · Where the data comes from