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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
60660 Chicago Cook County IL 42,750 $66,206 $287,500
46237 Indianapolis city (balance) Marion County IN 42,747 $76,676 $216,300
48858 Mount Pleasant Isabella County MI 42,732 $48,794 $168,000
46112 Brownsburg Hendricks County IN 42,491 $113,293 $295,900
46383 Valparaiso Porter County IN 42,464 $75,575 $258,400
46123 Avon Hendricks County IN 42,395 $102,989 $293,000
80602 Thornton Adams County CO 42,237 $146,679 $639,300
18702 Wilkes-Barre Luzerne County PA 42,120 $54,892 $115,700
47905 Lafayette Tippecanoe County IN 42,109 $63,115 $215,500
80010 Aurora Arapahoe County CO 42,010 $60,755 $385,700
60659 Chicago Cook County IL 42,008 $70,033 $358,800
60446 Romeoville Will County IL 41,933 $99,461 $245,100
49508 Kentwood Kent County MI 41,924 $65,328 $257,900
01420 Fitchburg Worcester County MA 41,677 $70,334 $294,600
60062 Northbrook Cook County IL 41,667 $142,759 $625,800
46514 Elkhart Elkhart County IN 41,480 $61,784 $170,900
01085 Westfield Hampden County MA 41,466 $83,821 $296,300
60652 Chicago Cook County IL 41,431 $78,559 $235,000
46385 Valparaiso Porter County IN 41,390 $97,208 $305,400
80249 Denver Denver County CO 41,209 $97,457 $457,500
49221 Adrian Lenawee County MI 41,041 $57,316 $158,700
80221 Berkley Adams County CO 40,938 $84,425 $449,700
60707 Elmwood Park Cook County IL 40,897 $82,746 $315,300
60025 Glenview Cook County IL 40,877 $119,639 $512,400
61554 Pekin Tazewell County IL 40,783 $62,484 $123,500
60462 Orland Park Cook County IL 40,700 $96,747 $330,400
53218 Milwaukee Milwaukee County WI 40,581 $42,207 $122,200
80916 Colorado Springs El Paso County CO 40,579 $63,399 $289,500
48170 Plymouth Wayne County MI 40,573 $109,442 $400,800
48911 Lansing Ingham County MI 40,407 $54,882 $136,900
49504 Grand Rapids Kent County MI 40,402 $68,326 $222,600
46368 Portage Porter County IN 40,237 $72,638 $213,500
46033 Carmel Hamilton County IN 40,153 $150,529 $458,600
44124 Pepper Pike Cuyahoga County OH 40,046 $78,895 $210,600
53204 Milwaukee Milwaukee County WI 40,008 $43,645 $106,000
01604 Worcester Worcester County MA 39,988 $72,911 $321,900
49426 Hudsonville Ottawa County MI 39,986 $106,981 $338,100
16001 Shanor-Northvue Butler County PA 39,733 $61,325 $191,400
49341 Rockford Kent County MI 39,680 $112,932 $347,700
62704 Springfield Sangamon County IL 39,597 $66,352 $166,900
80017 Aurora Arapahoe County CO 39,553 $76,458 $383,700
48198 Ypsilanti Washtenaw County MI 39,507 $63,678 $178,300
49507 Grand Rapids Kent County MI 39,389 $56,578 $179,600
46062 Noblesville Hamilton County IN 39,348 $116,834 $351,000
80014 Aurora Arapahoe County CO 39,277 $72,561 $386,500
60565 Naperville DuPage County IL 39,244 $160,238 $490,100
60068 Park Ridge Cook County IL 39,227 $138,201 $539,700
14701 Jamestown Chautauqua County NY 39,207 $50,909 $98,400
84121 Brighton Salt Lake County UT 39,204 $114,912 $614,500
80210 Denver Denver County CO 39,155 $120,156 $870,500

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.