Zone
3A
Plant hardiness zone 3A
ZIP codes in USDA plant hardiness zone 3A. Population, income, and housing from US5 published metrics.
ZIP codes
5
Population
4,089
Median household income (avg.)
$70,436
Average home value
$177,800
What is USDA zone 3A?
Zone 3A is a USDA / PRISM plant hardiness band based on average annual extreme minimum winter temperature. Growers use it to compare winter-cold exposure across regions — it is a climate label, not a planting prescription.
US5 lists 5 indexable ZIP codes in this band, covering about 4,089 combined ZIP-area residents. The table below is sorted by population; use pagination to browse the full published set.
How to use this zone page
Scan communities inside zone 3A, then open any ZIP for full demographics, climate normals, schools, and nearby amenities. Zone membership comes from the USDA hardiness summary joined to published ZIP profiles.
ZIPs in zone 3A
| ZIP | City | County | State | Population | Income | Home value |
|---|---|---|---|---|---|---|
| 55790 | Tower | St. Louis County | MN | 1,933 | $74,732 | $297,900 |
| 55732 | Babbitt | St. Louis County | MN | 1,398 | $62,604 | $173,600 |
| 55782 | Soudan | St. Louis County | MN | 439 | $55,658 | $99,400 |
| 56668 | Ranier | Koochiching County | MN | 227 | $88,750 | $180,600 |
| 56654 | — | Koochiching County | MN | 92 | — | $137,500 |
Frequently asked questions
What does zone 3A mean?
Zone 3A is a USDA plant hardiness band based on average annual extreme minimum winter temperature. It helps compare winter-cold exposure across places; it is not a planting prescription.
Why is the table sorted by population?
Population ordering surfaces larger communities first. The zone total counts all published ZIPs in band 3A; page through the table to browse beyond the first page.
Is a hardiness zone the same as a climate normal?
Hardiness zones summarize winter extreme cold. ZIP pages on US5 also show precipitation, snow, and FEMA risk context separately.