Zip Code 66536 — Saint Marys, KS
66536 is a ZIP Code associated with Saint Marys, KS, located within Pottawatomie. 66536 ranks #2 out of 9 ZIP codes in Pottawatomie County by population (and #146 out of 704 in KS). The area supports an estimated population of 4,204 residents across Data Pending housing units, with a population density of 24.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (39.224700, -96.073960)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 66536 |
| Primary City | Saint Marys |
| State / Province | KS |
| County | Pottawatomie |
| Total Population | 4,204 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 24.8 people/sq mi |
| Timezone | America/Chicago |
How 66536 Compares
| Metric | ZIP 66536 | Pottawatomie County | KS State Average |
|---|
| Population | 4,204 | 21,983 (Total) | 2,947,026 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 24.8 /sq mi | -- | -- |
| County Pop Rank | #2 of 9 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →