Zip Code 49270 — Petersburg, MI
49270 is a ZIP Code associated with Petersburg, MI, located within Monroe. 49270 ranks #10 out of 17 ZIP codes in Monroe County by population (and #456 out of 992 in MI). The area supports an estimated population of 5,567 residents across Data Pending housing units, with a population density of 47.9 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (41.868640, -83.682060)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 49270 |
| Primary City | Petersburg |
| State / Province | MI |
| County | Monroe |
| Total Population | 5,567 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 47.9 people/sq mi |
| Timezone | America/Detroit |
How 49270 Compares
| Metric | ZIP 49270 | Monroe County | MI State Average |
|---|
| Population | 5,567 | 162,831 (Total) | 10,077,716 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 47.9 /sq mi | -- | -- |
| County Pop Rank | #10 of 17 | -- | -- |
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 →