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Plant hardiness zone 6A

ZIP codes in USDA plant hardiness zone 6A. Population, income, and housing from US5 published metrics.

Zone
6A
ZIP codes
4,855
Population
35,646,945
Median household income (avg.)
$75,369
Average home value
$228,792
All hardiness zones Opportunity zones ZIP lists ZIP rankings

What is USDA zone 6A?

Zone 6A 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 4,855 indexable ZIP codes in this band, covering about 35,646,945 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 6A, 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 6A

ZIP City County State Population Income Home value
46168 Plainfield Hendricks County IN 38,889 $87,315 $271,400
46410 Merrillville Lake County IN 38,803 $61,735 $192,100
48706 Bay City Bay County MI 38,756 $61,908 $142,300
48430 Fenton Livingston County MI 38,731 $99,755 $308,500
61820 Champaign Champaign County IL 38,481 $31,031 $175,900
01545 Worcester Worcester County MA 38,440 $136,225 $555,500
53221 Milwaukee Milwaukee County WI 38,428 $61,640 $205,500
68521 Lincoln Lancaster County NE 38,386 $66,902 $235,600
60090 Wheeling Cook County IL 38,340 $83,449 $243,500
46901 Kokomo Howard County IN 38,254 $61,041 $131,700
46219 Indianapolis city (balance) Marion County IN 38,246 $57,811 $177,000
01040 Holyoke Hampden County MA 37,949 $51,892 $255,300
44240 Kent Portage County OH 37,889 $57,415 $216,000
49503 Grand Rapids Kent County MI 37,874 $61,734 $224,100
03103 Manchester Hillsborough County NH 37,659 $70,049 $313,500
46835 Fort Wayne Allen County IN 37,589 $75,595 $194,200
43040 Marysville Union County OH 37,582 $96,320 $275,700
60451 New Lenox Will County IL 37,481 $132,260 $373,100
13021 Auburn Cayuga County NY 37,479 $58,946 $169,300
64068 Liberty Clay County MO 37,466 $95,425 $268,200
80211 Denver Denver County CO 37,441 $117,685 $747,800
51503 Council Bluffs Pottawattamie County IA 37,411 $76,064 $252,600
80906 Colorado Springs El Paso County CO 37,403 $88,047 $543,400
48178 South Lyon Oakland County MI 37,303 $130,781 $392,300
45373 Troy Miami County OH 37,274 $78,278 $234,400
60031 Gurnee Lake County IL 37,208 $114,008 $322,300
60101 Addison DuPage County IL 37,202 $87,860 $315,300
68104 Omaha Douglas County NE 37,003 $57,488 $157,700
48105 Ann Arbor Washtenaw County MI 36,959 $94,737 $485,600
61704 Bloomington McLean County IL 36,938 $93,107 $242,000
86001 Fort Valley Coconino County AZ 36,900 $62,587 $570,900
80128 Columbine Jefferson County CO 36,859 $119,827 $554,100
60441 Lockport Will County IL 36,841 $104,271 $287,100
80112 Centennial Arapahoe County CO 36,687 $107,504 $627,500
49120 Niles Berrien County MI 36,652 $61,940 $166,800
46902 Kokomo Howard County IN 36,640 $59,548 $154,400
49203 Jackson Jackson County MI 36,520 $55,689 $150,900
53154 Oak Creek Milwaukee County WI 36,473 $93,120 $305,100
60477 Tinley Park Cook County IL 36,393 $93,862 $262,400
80031 Westminster Adams County CO 36,350 $106,244 $499,200
80220 Denver Denver County CO 36,311 $101,961 $739,600
80503 Longmont Boulder County CO 36,206 $118,465 $704,800
13126 Oswego Oswego County NY 36,199 $63,590 $134,600
80909 Colorado Springs El Paso County CO 36,171 $61,777 $352,400
46235 Indianapolis city (balance) Marion County IN 35,897 $56,160 $169,300
60624 Chicago Cook County IL 35,711 $32,607 $223,200
14086 Lancaster Erie County NY 35,659 $95,949 $263,600
61701 Bloomington McLean County IL 35,577 $55,882 $138,600
80021 Westminster Jefferson County CO 35,562 $105,645 $530,300
06790 Torrington Litchfield County CT 35,544 $69,720 $196,100

Frequently asked questions

What does zone 6A mean?

Zone 6A 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 6A; 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.