ZIP code · Side Lake · Minnesota · United States
ZIP code 55781 — Side Lake
ZIP code 55781 serves Side Lake, Minnesota.
- Postal code
- 55781Single source Value from one source, not cross-checked.
- City
- Side Lake
- County
- St. Louis FIPS 27137
- State
- Minnesota
- Country
- United States
- Coordinates
- 47.6671, -93.0424 — precision precise (locality)
View on OpenStreetMap - Population
- 847 (ZCTA, ACS 5-year)
- Population density
- 10 / sq mi
- Land area
- 81.4 sq mi (210.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $95,536
- Per-capita income
- $45,579
- Median age
- 62.4
- Households
- 347
- Housing units
- 868
- Median home value
- $366,400
- Congressional district
- MN-8 (119th Congress)
- USDA hardiness zone
- 3b (-35 to -30 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 218 (from the nearest rate centre)Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 55781 with another ZIP · ZIPs within 25 miles · distance from 55781
Map of ZIP code 55781
Climate — monthly normals
Warmest month Jul (avg high 77°F), coldest Jan (avg low -7°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 17 | 22 | 36 | 50 | 64 | 72 | 77 | 75 | 66 | 51 | 35 | 22 |
| Avg low °F | -7 | -5 | 11 | 25 | 37 | 47 | 51 | 49 | 42 | 31 | 18 | 3 |
NOAA 1991–2020 climate normals from the nearest station: CELINA 2E (13.8 mi) · NOAA NCEI
Places in ZIP 55781
- 1 parks
- 1 post offices
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page