ZIP codes in Sullivan County
14 ZIPs touch Sullivan County, Indiana. The blue dashed line is the county border; orange ZIPs reach into it.
14
ZIP codes
7
cross the county line
28,264
people in these ZIPs
92
counties in IN
Most people
Sullivan County ZIP list
More counties in Indiana
- Scott County6
- Shelby County17
- Spencer County19
- St. Joseph County31
- Starke County12
- Steuben County9
- Switzerland County10
- Tippecanoe County23
- Tipton County11
- Union County6
- Vanderburgh County35
- Vermillion County10
Questions people actually ask
How many ZIP codes are in Sullivan County, Indiana?
14 ZIP codes reach into Sullivan County, including 1 PO Box or single-address ZIPs placed by the town they serve. 7 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Sullivan County has the most people?
47882 (Sullivan) has about 8,735 residents, the most of any ZIP touching Sullivan County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Sullivan 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 Sullivan 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