Zip Code 55309 — Big Lake, MN
55309 is a ZIP Code associated with Big Lake, MN, located within Sherburne. 55309 ranks #2 out of 6 ZIP codes in Sherburne County by population (and #87 out of 881 in MN). The area supports an estimated population of 21,378 residents across Data Pending housing units, with a population density of 132.5 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (45.377580, -93.741070)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 55309 |
| Primary City | Big Lake |
| State / Province | MN |
| County | Sherburne |
| Total Population | 21,378 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 132.5 people/sq mi |
| Timezone | America/Chicago |
How 55309 Compares
| Metric | ZIP 55309 | Sherburne County | MN State Average |
|---|
| Population | 21,378 | 117,766 (Total) | 5,739,754 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 132.5 /sq mi | -- | -- |
| County Pop Rank | #2 of 6 | -- | -- |
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 →