Union County, Ohio ZIP Codes
- ZIP records
8 - Cities represented
8 - Sum of listed ZIP population estimates
51,752
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 43040 | Marysville | 38,990 |
| 2 | 43344 | Richwood | 6,173 |
| 3 | 43358 | West Mansfield | 2,275 |
| 4 | 43067 | Raymond | 1,884 |
| 5 | 43045 | Milford Center | 1,739 |
| 6 | 43036 | Magnetic Springs | 359 |
| 7 | 43077 | Unionville Center | 269 |
| 8 | 43007 | Broadway | 63 |
Cities in Union County
ZIP Directory
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.